Number
1,138
1,138 is a composite number, even, a calendar year.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 13
- Digital root
- 4
- Palindrome
- No
- Divisor count
- 4
- σ(n) — sum of divisors
- 1,710
Primality
Prime factorization: 2 × 569
Divisors & multiples
Aliquot sum (sum of proper divisors):
572
First multiples
Representations
- In words
- one thousand one hundred thirty-eight
- Ordinal
- 1138th
- Roman numeral
- MCXXXVIII
- Binary
- 10001110010
- Octal
- 2162
- Hexadecimal
- 472
Also seen as
Goldbach decomposition
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1138, here are decompositions:
- 29 + 1109 = 1138
- 41 + 1097 = 1138
- 47 + 1091 = 1138
- 89 + 1049 = 1138
- 107 + 1031 = 1138
- 167 + 971 = 1138
- 191 + 947 = 1138
- 197 + 941 = 1138
Showing the first eight; more decompositions exist.
Unicode codepoint
Ѳ
U+0472
Uppercase letter (Lu)
UTF-8 encoding: D1 B2 (2 bytes).
Hex color
#000472
RGB(0, 4, 114)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.4.114.