Number
1,728
1,728 is a composite number, even, a calendar year.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 18
- Digital root
- 9
- Palindrome
- No
- Divisor count
- 28
- σ(n) — sum of divisors
- 5,080
Primality
Prime factorization: 2 6 × 3 3
Divisors & multiples
All divisors (28)
Aliquot sum (sum of proper divisors):
3,352
Factor pairs (a × b = 1,728)
First multiples
Representations
- In words
- one thousand seven hundred twenty-eight
- Ordinal
- 1728th
- Roman numeral
- MDCCXXVIII
- Binary
- 11011000000
- Octal
- 3300
- Hexadecimal
- 6C0
Also seen as
Goldbach decomposition
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1728, here are decompositions:
- 5 + 1723 = 1728
- 7 + 1721 = 1728
- 19 + 1709 = 1728
- 29 + 1699 = 1728
- 31 + 1697 = 1728
- 59 + 1669 = 1728
- 61 + 1667 = 1728
- 71 + 1657 = 1728
Showing the first eight; more decompositions exist.
Unicode codepoint
ۀ
U+06C0
Other letter (Lo)
UTF-8 encoding: DB 80 (2 bytes).
Hex color
#0006C0
RGB(0, 6, 192)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.6.192.