Number
872
872 is a composite number, even, a calendar year.
Properties
- Parity
- Even
- Digit count
- 3
- Digit sum
- 17
- Digital root
- 8
- Palindrome
- No
- Divisor count
- 8
- σ(n) — sum of divisors
- 1,650
Primality
Prime factorization: 2 3 × 109
Divisors & multiples
Aliquot sum (sum of proper divisors):
778
Representations
- In words
- eight hundred seventy-two
- Ordinal
- 872nd
- Roman numeral
- DCCCLXXII
- Binary
- 1101101000
- Octal
- 1550
- Hexadecimal
- 368
Also seen as
Goldbach decomposition
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 872, here are decompositions:
- 13 + 859 = 872
- 19 + 853 = 872
- 43 + 829 = 872
- 61 + 811 = 872
- 103 + 769 = 872
- 139 + 733 = 872
- 163 + 709 = 872
- 181 + 691 = 872
Showing the first eight; more decompositions exist.
Unicode codepoint
ͨ
U+0368
Non-spacing mark (Mn)
UTF-8 encoding: CD A8 (2 bytes).
Hex color
#000368
RGB(0, 3, 104)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.3.104.