Number

1,888

1,888 is a composite number, even, a calendar year.

1,888 (one thousand eight hundred eighty-eight) is an even 4-digit number. It is a composite number with 12 divisors, and factors as 2⁵ × 59. Its proper divisors sum to 1,892, more than the number itself, making it an abundant number. Written other ways, in Roman numerals it is MDCCCLXXXVIII and in binary, 11101100000.

Abundant Number Arithmetic Number Flippable Happy Number Odious Number Pernicious Number Practical Number Recamán's Sequence Semiperfect Number Year

Interestingness

★ ★ ★ ★ ☆

6 notable facts · grade B

1,876 1,877 1,878 1,879 1,880 1,881 1,882 1,883 1,884 1,885 1,886 1,887 1,888 1,889 1,890 1,891 1,892 1,893 1,894 1,895 1,896 1,897 1,898 1,899 1,900

less more

Notable events — 1888 AD

Mar 12 The Great Blizzard of 1888 paralyzes the US Northeast.
Jun 15 Wilhelm II becomes German Emperor.
Aug 31 Jack the Ripper's first canonical victim is found murdered in Whitechapel.
Sep 4 George Eastman patents the first Kodak roll-film camera.
Aug 12 Bertha Benz makes the first long-distance automobile journey.

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

Year facts

Year type: Leap year
Divisible by 4 and not by 100; February has 29 days.
Days in year: 366
ISO weeks: 52
Started on: Sunday
January 1, 1888
Ended on: Monday
December 31, 1888
Friday the 13ths: 3
3 Friday the 13ths this year.
Easter Sunday: April 1
Sunday, April 1, 1888
Decade: 1880s
1880–1889
Century: 19th century
1801–1900
Millennium: 2nd millennium
1001–2000
Years ago: 138
138 years before 2026.
US presidential election: Yes
US holds a presidential election in years divisible by 4 starting from 1788.

In other calendars

Hebrew: 5648 / 5649 AM
Rosh Hashanah falls in September/October.
Islamic Hijri: 1305 / 1306 AH
Lunar calendar; year spans differ from Gregorian.
Chinese: Year of the zodiac:Earth zodiac:Rat
Sexagenary cycle position 25 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 2431 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Persian Solar Hijri: 1266 / 1267 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
Ethiopian: 1880 / 1881 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 1810 / 1809 Saka
Indian national calendar; year starts in March.
Japanese: Meiji 21
Reign-era counting from the start of each emperor's reign.

Properties

Parity: Even
Digit count: 4
Digit sum: 25
Digit product: 512
Digital root: 7
Palindrome: No
Bit width: 11 bits
Reversed: 8,881
Flips to (rotate 180°): 8,881
Recamán's sequence: a(7,968) = 1,888
Square (n²): 3,564,544
Cube (n³): 6,729,859,072
Divisor count: 12
σ(n) — sum of divisors: 3,780
φ(n) — Euler's totient: 928
Sum of prime factors: 69

Primality

Prime factorization: 2 ⁵ × 59

Nearest primes: 1,879 (−9) · 1,889 (+1)

Divisors & multiples

All divisors (12)

1 · 2 · 4 · 8 · 16 · 32 · 59 · 118 · 236 · 472 · 944 (half) · 1888

Aliquot sum (sum of proper divisors): 1,892

Factor pairs (a × b = 1,888)

1 × 1888

2 × 944

4 × 472

8 × 236

16 × 118

32 × 59

First multiples

1,888 · 3,776 (double) · 5,664 · 7,552 · 9,440 · 11,328 · 13,216 · 15,104 · 16,992 · 18,880

Sums & aliquot sequence

As consecutive integers: 3 + 4 + … + 61

Aliquot sequence: 1,888 → 1,892 → 1,804 → 1,724 → 1,300 → 1,738 → 1,142 → 574 → 434 → 334 → 170 → 154 → 134 → 70 → 74 → 40 → 50 — unresolved within range

Continued fraction of √n

√1,888 = [43; (2, 4, 1, 1, 1, 1, 2, 9, 3, 1, 2, 21, 2, 1, 3, 9, 2, 1, 1, 1, 1, 4, 2, 86)]

Period length 24 — the block in parentheses repeats forever.

Representations

In words: one thousand eight hundred eighty-eight
Ordinal: 1888th
Roman numeral: MDCCCLXXXVIII
Binary: 11101100000
Octal: 3540
Hexadecimal: 0x760
Base64: B2A=
One's complement: 63,647 (16-bit)
Scientific notation: 1.888 × 10³
As a duration: 1,888 s = 31 minutes, 28 seconds

In other bases

ternary (3) 2120221

quaternary (4) 131200

quinary (5) 30023

senary (6) 12424

septenary (7) 5335

nonary (9) 2527

undecimal (11) 1467

duodecimal (12) 1114

tridecimal (13) b23

tetradecimal (14) 98c

pentadecimal (15) 85d

Palindromic in base 7

As an angle

1,888° = 5 × 360° + 88°

88° ≈ 1.536 rad

Compass bearing: E (east)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒌋𒌋𒌋𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): ͵αωπηʹ
Mayan (base 20): 𝋤·𝋮·𝋨
Chinese: 一千八百八十八
Chinese (financial): 壹仟捌佰捌拾捌

In other modern scripts

Eastern Arabic ١٨٨٨ Devanagari १८८८ Bengali ১৮৮৮ Tamil ௧௮௮௮ Thai ๑๘๘๘ Tibetan ༡༨༨༨ Khmer ១៨៨៨ Lao ໑໘໘໘ Burmese ၁၈၈၈

Digit at this position in famous constants

π — Pi (π): Digit 1,888 = 5
e — Euler's number (e): Digit 1,888 = 3
φ — Golden ratio (φ): Digit 1,888 = 3
√2 — Pythagoras's (√2): Digit 1,888 = 8
ln 2 — Natural log of 2: Digit 1,888 = 5
γ — Euler-Mascheroni (γ): Digit 1,888 = 5

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1888, here are decompositions:

11 + 1877 = 1888
17 + 1871 = 1888
41 + 1847 = 1888
101 + 1787 = 1888
167 + 1721 = 1888
179 + 1709 = 1888
191 + 1697 = 1888
251 + 1637 = 1888

Showing the first eight; more decompositions exist.

Unicode codepoint

Arabic Letter Feh With Two Dots Below

U+0760

Other letter (Lo)

UTF-8 encoding: DD A0 (2 bytes).

Lookup U+0760 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#000760

RGB(0, 7, 96)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.7.96.

Address: 0.0.7.96
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.7.96

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

Musical pitch

Heard as a frequency, 1,888 Hz is closest to:

Concert pitch (A4 = 440 Hz): A♯6 (1864.7 Hz, +22¢)
Scientific pitch (C4 = 256 Hz): B6 (1933.1 Hz, -41¢)
Baroque pitch (A4 = 415 Hz): B6 (1863.3 Hz, +23¢)

Position in π

The digit sequence 1888 first appears in π at position 20,806 of the decimal expansion (the 20,806ordinal-suffix:th 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 1888 on Pi Search ↗