Number
1,604
1,604 is a composite number, even, a calendar year.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 11
- Digital root
- 2
- Palindrome
- No
- Divisor count
- 6
- σ(n) — sum of divisors
- 2,814
Primality
Prime factorization: 2 2 × 401
Divisors & multiples
Aliquot sum (sum of proper divisors):
1,210
First multiples
Representations
- In words
- one thousand six hundred four
- Ordinal
- 1604th
- Roman numeral
- MDCIV
- Binary
- 11001000100
- Octal
- 3104
- Hexadecimal
- 644
Also seen as
Goldbach decomposition
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1604, here are decompositions:
- 3 + 1601 = 1604
- 7 + 1597 = 1604
- 37 + 1567 = 1604
- 61 + 1543 = 1604
- 73 + 1531 = 1604
- 151 + 1453 = 1604
- 157 + 1447 = 1604
- 181 + 1423 = 1604
Showing the first eight; more decompositions exist.
Unicode codepoint
ل
U+0644
Other letter (Lo)
UTF-8 encoding: D9 84 (2 bytes).
Hex color
#000644
RGB(0, 6, 68)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.6.68.