Number
1,988
1,988 is a composite number, even, a calendar year.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 26
- Digital root
- 8
- Palindrome
- No
- Divisor count
- 12
- σ(n) — sum of divisors
- 4,032
Primality
Prime factorization: 2 2 × 7 × 71
Divisors & multiples
Aliquot sum (sum of proper divisors):
2,044
First multiples
Representations
- In words
- one thousand nine hundred eighty-eight
- Ordinal
- 1988th
- Roman numeral
- MCMLXXXVIII
- Binary
- 11111000100
- Octal
- 3704
- Hexadecimal
- 7C4
Also seen as
Goldbach decomposition
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1988, here are decompositions:
- 37 + 1951 = 1988
- 109 + 1879 = 1988
- 127 + 1861 = 1988
- 157 + 1831 = 1988
- 199 + 1789 = 1988
- 211 + 1777 = 1988
- 229 + 1759 = 1988
- 241 + 1747 = 1988
Showing the first eight; more decompositions exist.
Unicode codepoint
߄
U+07C4
Decimal digit (Nd)
UTF-8 encoding: DF 84 (2 bytes).
Hex color
#0007C4
RGB(0, 7, 196)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.7.196.