Number

1,950

1,950 is a composite number, even, a calendar year.

1,950 (one thousand nine hundred fifty) is an even 4-digit number. It is a composite number with 24 divisors, and factors as 2 × 3 × 5² × 13. Its proper divisors sum to 3,258, more than the number itself, making it an abundant number. Written other ways, in Roman numerals it is MCML and in binary, 11110011110.

Abundant Number Arithmetic Number Cube-Free Evil Number Gapful Number Harshad / Niven Practical Number Recamán's Sequence Semiperfect Number Year

Interestingness

★ ★ ★ ★ ☆

7 notable facts · grade B

1,938 1,939 1,940 1,941 1,942 1,943 1,944 1,945 1,946 1,947 1,948 1,949 1,950 1,951 1,952 1,953 1,954 1,955 1,956 1,957 1,958 1,959 1,960 1,961 1,962

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Notable events — 1950 AD

Jan 31 President Truman authorizes development of the hydrogen bomb.
Feb 9 Senator Joseph McCarthy launches the Red Scare with his Wheeling speech.
Jun 25 North Korea invades South Korea, starting the Korean War.
Sep 15 UN forces land at Inchon, reversing the war's tide.
Nov 26 Chinese forces enter the Korean War.

Events compiled from Wikipedia ↗ · Licensed CC BY-SA 4.0

Year facts

Year type: Common year
Standard 365-day year; not divisible by 4 (or divisible by 100 but not 400).
Days in year: 365
ISO weeks: 52
Started on: Sunday
January 1, 1950
Ended on: Sunday
December 31, 1950
Friday the 13ths: 2
2 Friday the 13ths this year.
Easter Sunday: April 9
Sunday, April 9, 1950
Decade: 1950s
1950–1959
Century: 20th century
1901–2000
Millennium: 2nd millennium
1001–2000
Years ago: 76
76 years before 2026.
FIFA World Cup: Yes
Men's FIFA World Cup is held every four years (skipped 1942 and 1946 due to WWII).

In other calendars

Hebrew: 5710 / 5711 AM
Rosh Hashanah falls in September/October.
Islamic Hijri: 1369 / 1370 AH
Lunar calendar; year spans differ from Gregorian.
Chinese: Year of the zodiac:Metal zodiac:Tiger
Sexagenary cycle position 27 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 2493 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Persian Solar Hijri: 1328 / 1329 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
Ethiopian: 1942 / 1943 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 1872 / 1871 Saka
Indian national calendar; year starts in March.
Japanese: Shōwa 25
Reign-era counting from the start of each emperor's reign.

Properties

Parity: Even
Digit count: 4
Digit sum: 15
Digit product: 0
Digital root: 6
Palindrome: No
Bit width: 11 bits
Reversed: 591
Recamán's sequence: a(3,851) = 1,950
Square (n²): 3,802,500
Cube (n³): 7,414,875,000
Divisor count: 24
σ(n) — sum of divisors: 5,208
φ(n) — Euler's totient: 480
Sum of prime factors: 28

Primality

Prime factorization: 2 × 3 × 5 ² × 13

Nearest primes: 1,949 (−1) · 1,951 (+1)

Divisors & multiples

All divisors (24)

1 · 2 · 3 · 5 · 6 · 10 · 13 · 15 · 25 · 26 · 30 · 39 · 50 · 65 · 75 · 78 · 130 · 150 · 195 · 325 · 390 · 650 · 975 (half) · 1950

Aliquot sum (sum of proper divisors): 3,258

Factor pairs (a × b = 1,950)

1 × 1950

2 × 975

3 × 650

5 × 390

6 × 325

10 × 195

13 × 150

15 × 130

25 × 78

26 × 75

30 × 65

39 × 50

First multiples

1,950 · 3,900 (double) · 5,850 · 7,800 · 9,750 · 11,700 · 13,650 · 15,600 · 17,550 · 19,500

Sums & aliquot sequence

As consecutive integers: 649 + 650 + 651 486 + 487 + 488 + 489 388 + 389 + 390 + 391 + 392 157 + 158 + … + 168

Aliquot sequence: 1,950 → 3,258 → 3,840 → 8,424 → 16,986 → 19,014 → 19,026 → 28,398 → 28,410 → 39,846 → 42,954 → 42,966 → 76,842 → 94,038 → 121,002 → 166,230 → 266,202 — unresolved within range

Continued fraction of √n

√1,950 = [44; (6, 3, 2, 1, 2, 1, 2, 3, 6, 88)]

Period length 10 — the block in parentheses repeats forever.

Representations

In words: one thousand nine hundred fifty
Ordinal: 1950th
Roman numeral: MCML
Binary: 11110011110
Octal: 3636
Hexadecimal: 0x79E
Base64: B54=
One's complement: 63,585 (16-bit)
Scientific notation: 1.95 × 10³
As a duration: 1,950 s = 32 minutes, 30 seconds

In other bases

ternary (3) 2200020

quaternary (4) 132132

quinary (5) 30300

senary (6) 13010

septenary (7) 5454

nonary (9) 2606

undecimal (11) 1513

duodecimal (12) 1166

tridecimal (13) b70

tetradecimal (14) 9d4

pentadecimal (15) 8a0

As an angle

1,950° = 5 × 360° + 150°

150° ≈ 2.618 rad

Compass bearing: SSE (south-southeast)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒌋𒌋𒌋𒁹𒁹 𒌋𒌋𒌋
Egyptian hieroglyphic: 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆
Greek (Milesian): ͵αϡνʹ
Mayan (base 20): 𝋤·𝋱·𝋪
Chinese: 一千九百五十
Chinese (financial): 壹仟玖佰伍拾

In other modern scripts

Eastern Arabic ١٩٥٠ Devanagari १९५० Bengali ১৯৫০ Tamil ௧௯௫௦ Thai ๑๙๕๐ Tibetan ༡༩༥༠ Khmer ១៩៥០ Lao ໑໙໕໐ Burmese ၁၉၅၀

Digit at this position in famous constants

π — Pi (π): Digit 1,950 = 8
e — Euler's number (e): Digit 1,950 = 8
φ — Golden ratio (φ): Digit 1,950 = 6
√2 — Pythagoras's (√2): Digit 1,950 = 6
ln 2 — Natural log of 2: Digit 1,950 = 3
γ — Euler-Mascheroni (γ): Digit 1,950 = 3

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1950, here are decompositions:

17 + 1933 = 1950
19 + 1931 = 1950
37 + 1913 = 1950
43 + 1907 = 1950
61 + 1889 = 1950
71 + 1879 = 1950
73 + 1877 = 1950
79 + 1871 = 1950

Showing the first eight; more decompositions exist.

Unicode codepoint

Thaana Letter Saadhu

U+079E

Other letter (Lo)

UTF-8 encoding: DE 9E (2 bytes).

Lookup U+079E on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#00079E

RGB(0, 7, 158)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.7.158.

Address: 0.0.7.158
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.7.158

Unspecified address (0.0.0.0/8) — "this network" placeholder.

Musical pitch

Heard as a frequency, 1,950 Hz is closest to:

Concert pitch (A4 = 440 Hz): B6 (1975.5 Hz, -23¢)
Scientific pitch (C4 = 256 Hz): B6 (1933.1 Hz, +15¢)
Baroque pitch (A4 = 415 Hz): C7 (1974.1 Hz, -21¢)

Position in π

The digit sequence 1950 first appears in π at position 23,961 of the decimal expansion (the 23,961ordinal-suffix:st digit after the integer 3).

Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.

Look up 1950 on Pi Search ↗