Number
1,648
1,648 is a composite number, even, a calendar year.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 19
- Digital root
- 1
- Palindrome
- No
- Divisor count
- 10
- σ(n) — sum of divisors
- 3,224
Primality
Prime factorization: 2 4 × 103
Divisors & multiples
Aliquot sum (sum of proper divisors):
1,576
First multiples
Representations
- In words
- one thousand six hundred forty-eight
- Ordinal
- 1648th
- Roman numeral
- MDCXLVIII
- Binary
- 11001110000
- Octal
- 3160
- Hexadecimal
- 670
Also seen as
Goldbach decomposition
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1648, here are decompositions:
- 11 + 1637 = 1648
- 29 + 1619 = 1648
- 41 + 1607 = 1648
- 47 + 1601 = 1648
- 89 + 1559 = 1648
- 137 + 1511 = 1648
- 149 + 1499 = 1648
- 167 + 1481 = 1648
Showing the first eight; more decompositions exist.
Unicode codepoint
ٰ
U+0670
Non-spacing mark (Mn)
UTF-8 encoding: D9 B0 (2 bytes).
Hex color
#000670
RGB(0, 6, 112)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.6.112.