Number
1,864
1,864 is a composite number, even, a calendar year.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 19
- Digital root
- 1
- Palindrome
- No
- Divisor count
- 8
- σ(n) — sum of divisors
- 3,510
Primality
Prime factorization: 2 3 × 233
Divisors & multiples
Aliquot sum (sum of proper divisors):
1,646
First multiples
Representations
- In words
- one thousand eight hundred sixty-four
- Ordinal
- 1864th
- Roman numeral
- MDCCCLXIV
- Binary
- 11101001000
- Octal
- 3510
- Hexadecimal
- 748
Also seen as
Goldbach decomposition
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1864, here are decompositions:
- 3 + 1861 = 1864
- 17 + 1847 = 1864
- 41 + 1823 = 1864
- 53 + 1811 = 1864
- 131 + 1733 = 1864
- 167 + 1697 = 1864
- 197 + 1667 = 1864
- 227 + 1637 = 1864
Showing the first eight; more decompositions exist.
Unicode codepoint
݈
U+0748
Non-spacing mark (Mn)
UTF-8 encoding: DD 88 (2 bytes).
Hex color
#000748
RGB(0, 7, 72)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.7.72.