number.wiki
Number

1,240

1,240 is a composite number, even, a calendar year.

Abundant Number Square Pyramidal Year

Properties

Parity
Even
Digit count
4
Digit sum
7
Digital root
7
Palindrome
No
Divisor count
16
σ(n) — sum of divisors
2,880

Primality

Prime factorization: 2 3 × 5 × 31

Divisors & multiples

All divisors (16)
1 · 2 · 4 · 5 · 8 · 10 · 20 · 31 · 40 · 62 · 124 · 155 · 248 · 310 · 620 · 1240
Aliquot sum (sum of proper divisors): 1,640
Factor pairs (a × b = 1,240)
1 × 1240
2 × 620
4 × 310
5 × 248
8 × 155
10 × 124
20 × 62
31 × 40
First multiples
1,240 · 2,480 · 3,720 · 4,960 · 6,200 · 7,440 · 8,680 · 9,920 · 11,160 · 12,400

Representations

In words
one thousand two hundred forty
Ordinal
1240th
Roman numeral
MCCXL
Binary
10011011000
Octal
2330
Hexadecimal
4D8

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1240, here are decompositions:

  • 3 + 1237 = 1240
  • 11 + 1229 = 1240
  • 17 + 1223 = 1240
  • 23 + 1217 = 1240
  • 47 + 1193 = 1240
  • 53 + 1187 = 1240
  • 59 + 1181 = 1240
  • 89 + 1151 = 1240

Showing the first eight; more decompositions exist.

Unicode codepoint
Ә
U+04D8
Uppercase letter (Lu)

UTF-8 encoding: D3 98 (2 bytes).

Lookup U+04D8 on Compart ↗ Lookup on FileFormat.Info ↗
Hex color
#0004D8
RGB(0, 4, 216)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.4.216.