number.wiki
Number

312

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

Abundant Number Harshad / Niven Year

Properties

Parity
Even
Digit count
3
Digit sum
6
Digital root
6
Palindrome
No
Divisor count
16
σ(n) — sum of divisors
840

Primality

Prime factorization: 2 3 × 3 × 13

Divisors & multiples

All divisors (16)
1 · 2 · 3 · 4 · 6 · 8 · 12 · 13 · 24 · 26 · 39 · 52 · 78 · 104 · 156 · 312
Aliquot sum (sum of proper divisors): 528
Factor pairs (a × b = 312)
1 × 312
2 × 156
3 × 104
4 × 78
6 × 52
8 × 39
12 × 26
13 × 24
First multiples
312 · 624 · 936 · 1,248 · 1,560 · 1,872 · 2,184 · 2,496 · 2,808 · 3,120

Representations

In words
three hundred twelve
Ordinal
312th
Roman numeral
CCCXII
Binary
100111000
Octal
470
Hexadecimal
138

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 312, here are decompositions:

  • 5 + 307 = 312
  • 19 + 293 = 312
  • 29 + 283 = 312
  • 31 + 281 = 312
  • 41 + 271 = 312
  • 43 + 269 = 312
  • 61 + 251 = 312
  • 71 + 241 = 312

Showing the first eight; more decompositions exist.

Unicode codepoint
ĸ
U+0138
Lowercase letter (Ll)

UTF-8 encoding: C4 B8 (2 bytes).

Lookup U+0138 on Compart ↗ Lookup on FileFormat.Info ↗
Hex color
#000138
RGB(0, 1, 56)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.56.