Number
1,618
1,618 is a composite number, even, a calendar year.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 16
- Digital root
- 7
- Palindrome
- No
- Divisor count
- 4
- σ(n) — sum of divisors
- 2,430
Primality
Prime factorization: 2 × 809
Divisors & multiples
Aliquot sum (sum of proper divisors):
812
First multiples
Representations
- In words
- one thousand six hundred eighteen
- Ordinal
- 1618th
- Roman numeral
- MDCXVIII
- Binary
- 11001010010
- Octal
- 3122
- Hexadecimal
- 652
Also seen as
Goldbach decomposition
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1618, here are decompositions:
- 5 + 1613 = 1618
- 11 + 1607 = 1618
- 17 + 1601 = 1618
- 47 + 1571 = 1618
- 59 + 1559 = 1618
- 107 + 1511 = 1618
- 131 + 1487 = 1618
- 137 + 1481 = 1618
Showing the first eight; more decompositions exist.
Unicode codepoint
ْ
U+0652
Non-spacing mark (Mn)
UTF-8 encoding: D9 92 (2 bytes).
Hex color
#000652
RGB(0, 6, 82)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.6.82.