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10,890

10,890 is a composite number, even.

This number doesn't have a permanent NumberWiki page yet — what you see below is computed live. Pages get added to the permanent index when they're notable (years, primes, curated, etc.).
Abundant Number Evil Number Flippable Gapful Number Harshad / Niven Practical Number Recamán's Sequence Semiperfect Number

Properties

Parity
Even
Digit count
5
Digit sum
18
Digit product
0
Digital root
9
Palindrome
No
Bit width
14 bits
Reversed
9,801
Flips to (rotate 180°)
6,801
Recamán's sequence
a(174,479) = 10,890
Square (n²)
118,592,100
Cube (n³)
1,291,467,969,000
Divisor count
36
σ(n) — sum of divisors
31,122
φ(n) — Euler's totient
2,640
Sum of prime factors
35

Primality

Prime factorization: 2 × 3 2 × 5 × 11 2

Nearest primes: 10,889 (−1) · 10,891 (+1)

Divisors & multiples

All divisors (36)
1 · 2 · 3 · 5 · 6 · 9 · 10 · 11 · 15 · 18 · 22 · 30 · 33 · 45 · 55 · 66 · 90 · 99 · 110 · 121 · 165 · 198 · 242 · 330 · 363 · 495 · 605 · 726 · 990 · 1089 · 1210 · 1815 · 2178 · 3630 · 5445 (half) · 10890
Aliquot sum (sum of proper divisors): 20,232
Factor pairs (a × b = 10,890)
1 × 10890
2 × 5445
3 × 3630
5 × 2178
6 × 1815
9 × 1210
10 × 1089
11 × 990
15 × 726
18 × 605
22 × 495
30 × 363
33 × 330
45 × 242
55 × 198
66 × 165
90 × 121
99 × 110
First multiples
10,890 · 21,780 (double) · 32,670 · 43,560 · 54,450 · 65,340 · 76,230 · 87,120 · 98,010 · 108,900

Sums & aliquot sequence

As a sum of two squares: 33² + 99²
As consecutive integers: 3,629 + 3,630 + 3,631 2,721 + 2,722 + 2,723 + 2,724 2,176 + 2,177 + 2,178 + 2,179 + 2,180 1,206 + 1,207 + … + 1,214
Aliquot sequence: 10,890 20,232 34,758 40,590 77,346 90,276 120,396 166,324 131,820 268,020 545,520 1,146,336 1,863,048 3,218,712 7,149,288 11,619,672 17,429,568 — unresolved within range

Representations

In words
ten thousand eight hundred ninety
Ordinal
10890th
Binary
10101010001010
Octal
25212
Hexadecimal
0x2A8A
Base64
Koo=
One's complement
54,645 (16-bit)
In other bases
ternary (3) 112221100
quaternary (4) 2222022
quinary (5) 322030
senary (6) 122230
septenary (7) 43515
nonary (9) 15840
undecimal (11) 8200
duodecimal (12) 6376
tridecimal (13) 4c59
tetradecimal (14) 3d7c
pentadecimal (15) 3360

Historical numeral systems

Babylonian (base 60)
𒁹𒁹𒁹 𒁹 𒌋𒌋𒌋
Egyptian hieroglyphic
𓂍𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆
Greek (Milesian)
͵ιωϟʹ
Mayan (base 20)
𝋡·𝋧·𝋤·𝋪
Chinese
一萬零八百九十
Chinese (financial)
壹萬零捌佰玖拾
In other modern scripts
Eastern Arabic ١٠٨٩٠ Devanagari १०८९० Bengali ১০৮৯০ Tamil ௧௦௮௯௦ Thai ๑๐๘๙๐ Tibetan ༡༠༨༩༠ Khmer ១០៨៩០ Lao ໑໐໘໙໐ Burmese ၁၀၈၉၀

Digit at this position in famous constants

π — Pi (π)
Digit 10,890 = 3
e — Euler's number (e)
Digit 10,890 = 1
φ — Golden ratio (φ)
Digit 10,890 = 0
√2 — Pythagoras's (√2)
Digit 10,890 = 1
ln 2 — Natural log of 2
Digit 10,890 = 2
γ — Euler-Mascheroni (γ)
Digit 10,890 = 7

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 10890, here are decompositions:

  • 7 + 10883 = 10890
  • 23 + 10867 = 10890
  • 29 + 10861 = 10890
  • 31 + 10859 = 10890
  • 37 + 10853 = 10890
  • 43 + 10847 = 10890
  • 53 + 10837 = 10890
  • 59 + 10831 = 10890

Showing the first eight; more decompositions exist.

Unicode codepoint
Greater-Than And Not Approximate
U+2A8A
Math symbol (Sm)

UTF-8 encoding: E2 AA 8A (3 bytes).

Hex color
#002A8A
RGB(0, 42, 138)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.42.138.

Address
0.0.42.138
Class
reserved
IPv4-mapped IPv6
::ffff:0.0.42.138

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

Position in π

The digit sequence 10890 first appears in π at position 18,692 of the decimal expansion (the 18,692ordinal-suffix:nd 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.