Number
868
868 is a composite number, even, a calendar year.
Properties
- Parity
- Even
- Digit count
- 3
- Digit sum
- 22
- Digital root
- 4
- Palindrome
- Yes
- Divisor count
- 12
- σ(n) — sum of divisors
- 1,792
Primality
Prime factorization: 2 2 × 7 × 31
Divisors & multiples
Aliquot sum (sum of proper divisors):
924
Representations
- In words
- eight hundred sixty-eight
- Ordinal
- 868th
- Roman numeral
- DCCCLXVIII
- Binary
- 1101100100
- Octal
- 1544
- Hexadecimal
- 364
Also seen as
Goldbach decomposition
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 868, here are decompositions:
- 5 + 863 = 868
- 11 + 857 = 868
- 29 + 839 = 868
- 41 + 827 = 868
- 47 + 821 = 868
- 59 + 809 = 868
- 71 + 797 = 868
- 107 + 761 = 868
Showing the first eight; more decompositions exist.
Unicode codepoint
ͤ
U+0364
Non-spacing mark (Mn)
UTF-8 encoding: CD A4 (2 bytes).
Hex color
#000364
RGB(0, 3, 100)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.3.100.