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Number

858

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

Abundant Number Palindrome Squarefree Year

Properties

Parity
Even
Digit count
3
Digit sum
21
Digital root
3
Palindrome
Yes
Divisor count
16
σ(n) — sum of divisors
2,016

Primality

Prime factorization: 2 × 3 × 11 × 13

Divisors & multiples

All divisors (16)
1 · 2 · 3 · 6 · 11 · 13 · 22 · 26 · 33 · 39 · 66 · 78 · 143 · 286 · 429 · 858
Aliquot sum (sum of proper divisors): 1,158
Factor pairs (a × b = 858)
1 × 858
2 × 429
3 × 286
6 × 143
11 × 78
13 × 66
22 × 39
26 × 33
First multiples
858 · 1,716 · 2,574 · 3,432 · 4,290 · 5,148 · 6,006 · 6,864 · 7,722 · 8,580

Representations

In words
eight hundred fifty-eight
Ordinal
858th
Roman numeral
DCCCLVIII
Binary
1101011010
Octal
1532
Hexadecimal
35A

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 858, here are decompositions:

  • 5 + 853 = 858
  • 19 + 839 = 858
  • 29 + 829 = 858
  • 31 + 827 = 858
  • 37 + 821 = 858
  • 47 + 811 = 858
  • 61 + 797 = 858
  • 71 + 787 = 858

Showing the first eight; more decompositions exist.

Unicode codepoint
͚
U+035A
Non-spacing mark (Mn)

UTF-8 encoding: CD 9A (2 bytes).

Lookup U+035A on Compart ↗ Lookup on FileFormat.Info ↗
Hex color
#00035A
RGB(0, 3, 90)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.3.90.