Number

930

930 is a composite number, even, a calendar year.

930 (nine hundred thirty) is an even 3-digit number. It is a composite number with 16 divisors, and factors as 2 × 3 × 5 × 31. Its proper divisors sum to 1,374, more than the number itself, making it an abundant number. Written other ways, in Roman numerals it is CMXXX and in binary, 1110100010.

Abundant Number Arithmetic Number Cube-Free Descending Digits Odious Number Pernicious Number Practical Number Pronic / Oblong Recamán's Sequence Semiperfect Number Squarefree Year

Interestingness

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8 notable facts · grade A

918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942

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Historical context — 930 AD

Calendar year

Year 930 (CMXXX) was a common year starting on Friday of the Julian calendar.

Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 Read the full article on Wikipedia →

Historical context — 930 BC

Decade

The 930s BC is a decade that lasted from 939 BC to 930 BC.

Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 Read the full article on Wikipedia →

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, 930
Ended on: Sunday
December 31, 930
Friday the 13ths: 2
2 Friday the 13ths this year.
Decade: 930s
930–939
Century: 10th century
901–1000
Millennium: 1st millennium
1–1000
Years ago: 1,096
1096 years before 2026.

In other calendars

Hebrew: 4690 / 4691 AM
Rosh Hashanah falls in September/October.
Islamic Hijri: 317 / 318 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: 1473 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Persian Solar Hijri: 308 / 309 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
Ethiopian: 922 / 923 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 852 / 851 Saka
Indian national calendar; year starts in March.

Properties

Parity: Even
Digit count: 3
Digit sum: 12
Digit product: 0
Digital root: 3
Palindrome: No
Bit width: 10 bits
Reversed: 39
Recamán's sequence: a(611) = 930
Square (n²): 864,900
Cube (n³): 804,357,000
Divisor count: 16
σ(n) — sum of divisors: 2,304
φ(n) — Euler's totient: 240
Sum of prime factors: 41

Primality

Prime factorization: 2 × 3 × 5 × 31

Nearest primes: 929 (−1) · 937 (+7)

Divisors & multiples

All divisors (16)

1 · 2 · 3 · 5 · 6 · 10 · 15 · 30 · 31 · 62 · 93 · 155 · 186 · 310 · 465 (half) · 930

Aliquot sum (sum of proper divisors): 1,374

Factor pairs (a × b = 930)

1 × 930

2 × 465

3 × 310

5 × 186

6 × 155

10 × 93

15 × 62

30 × 31

First multiples

930 · 1,860 (double) · 2,790 · 3,720 · 4,650 · 5,580 · 6,510 · 7,440 · 8,370 · 9,300

Sums & aliquot sequence

As consecutive integers: 309 + 310 + 311 231 + 232 + 233 + 234 184 + 185 + 186 + 187 + 188 72 + 73 + … + 83

Aliquot sequence: 930 → 1,374 → 1,386 → 2,358 → 2,790 → 4,698 → 6,192 → 11,540 → 12,736 → 12,664 → 11,096 → 11,104 → 10,820 → 11,944 → 10,466 → 5,236 → 6,860 — unresolved within range

Continued fraction of √n

√930 = [30; (2, 60)]

Period length 2 — the block in parentheses repeats forever.

Representations

In words: nine hundred thirty
Ordinal: 930th
Roman numeral: CMXXX
Binary: 1110100010
Octal: 1642
Hexadecimal: 0x3A2
Base64: A6I=
One's complement: 64,605 (16-bit)
Scientific notation: 9.3 × 10²
As a duration: 930 s = 15 minutes, 30 seconds

In other bases

ternary (3) 1021110

quaternary (4) 32202

quinary (5) 12210

senary (6) 4150

septenary (7) 2466

nonary (9) 1243

undecimal (11) 776

duodecimal (12) 656

tridecimal (13) 567

tetradecimal (14) 4a6

pentadecimal (15) 420

Palindromic in base 12

As an angle

930° = 2 × 360° + 210°

210° ≈ 3.665 rad

Compass bearing: SSW (south-southwest)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋
Egyptian hieroglyphic: 𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆
Greek (Milesian): ϡλʹ
Mayan (base 20): 𝋢·𝋦·𝋪
Chinese: 九百三十
Chinese (financial): 玖佰參拾

In other modern scripts

Eastern Arabic ٩٣٠ Devanagari ९३० Bengali ৯৩০ Tamil ௯௩௦ Thai ๙๓๐ Tibetan ༩༣༠ Khmer ៩៣០ Lao ໙໓໐ Burmese ၉၃၀

Digit at this position in famous constants

π — Pi (π): Digit 930 = 6
e — Euler's number (e): Digit 930 = 6
φ — Golden ratio (φ): Digit 930 = 3
√2 — Pythagoras's (√2): Digit 930 = 3
ln 2 — Natural log of 2: Digit 930 = 0
γ — Euler-Mascheroni (γ): Digit 930 = 0

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 930, here are decompositions:

11 + 919 = 930
19 + 911 = 930
23 + 907 = 930
43 + 887 = 930
47 + 883 = 930
53 + 877 = 930
67 + 863 = 930
71 + 859 = 930

Showing the first eight; more decompositions exist.

Hex color

#0003A2

RGB(0, 3, 162)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.3.162.

Address: 0.0.3.162
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.3.162

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

NANP area code 930

The number 930 is an active NANP area code (North American Numbering Plan).

Primary area: Evansville / Bloomington
Region: Indiana
Country: United States

Most NANP area codes have multiple overlays in dense regions; the primary area listed is the historic/largest population center for this code.

Look up area code 930 ↗

Musical pitch

Heard as a frequency, 930 Hz is closest to:

Concert pitch (A4 = 440 Hz): A♯5 (932.3 Hz, -4¢)
Scientific pitch (C4 = 256 Hz): A♯5 (912.3 Hz, +33¢)
Baroque pitch (A4 = 415 Hz): B5 (931.6 Hz, -3¢)