number.wiki
Number

320

320 is a composite number, even, a calendar year.

Abundant Number Happy Number Harshad / Niven Year

Properties

Parity
Even
Digit count
3
Digit sum
5
Digital root
5
Palindrome
No
Divisor count
14
σ(n) — sum of divisors
762

Primality

Prime factorization: 2 6 × 5

Divisors & multiples

All divisors (14)
1 · 2 · 4 · 5 · 8 · 10 · 16 · 20 · 32 · 40 · 64 · 80 · 160 · 320
Aliquot sum (sum of proper divisors): 442
Factor pairs (a × b = 320)
1 × 320
2 × 160
4 × 80
5 × 64
8 × 40
10 × 32
16 × 20
First multiples
320 · 640 · 960 · 1,280 · 1,600 · 1,920 · 2,240 · 2,560 · 2,880 · 3,200

Representations

In words
three hundred twenty
Ordinal
320th
Roman numeral
CCCXX
Binary
101000000
Octal
500
Hexadecimal
140

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 320, here are decompositions:

  • 3 + 317 = 320
  • 7 + 313 = 320
  • 13 + 307 = 320
  • 37 + 283 = 320
  • 43 + 277 = 320
  • 79 + 241 = 320
  • 97 + 223 = 320
  • 109 + 211 = 320

Showing the first eight; more decompositions exist.

Unicode codepoint
ŀ
U+0140
Lowercase letter (Ll)

UTF-8 encoding: C5 80 (2 bytes).

Lookup U+0140 on Compart ↗ Lookup on FileFormat.Info ↗
Hex color
#000140
RGB(0, 1, 64)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.64.