number.wiki
Number

1,720

1,720 is a composite number, even, a calendar year.

Abundant Number Harshad / Niven Year

Properties

Parity
Even
Digit count
4
Digit sum
10
Digital root
1
Palindrome
No
Divisor count
16
σ(n) — sum of divisors
3,960

Primality

Prime factorization: 2 3 × 5 × 43

Divisors & multiples

All divisors (16)
1 · 2 · 4 · 5 · 8 · 10 · 20 · 40 · 43 · 86 · 172 · 215 · 344 · 430 · 860 · 1720
Aliquot sum (sum of proper divisors): 2,240
Factor pairs (a × b = 1,720)
1 × 1720
2 × 860
4 × 430
5 × 344
8 × 215
10 × 172
20 × 86
40 × 43
First multiples
1,720 · 3,440 · 5,160 · 6,880 · 8,600 · 10,320 · 12,040 · 13,760 · 15,480 · 17,200

Representations

In words
one thousand seven hundred twenty
Ordinal
1720th
Roman numeral
MDCCXX
Binary
11010111000
Octal
3270
Hexadecimal
6B8

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1720, here are decompositions:

  • 11 + 1709 = 1720
  • 23 + 1697 = 1720
  • 53 + 1667 = 1720
  • 83 + 1637 = 1720
  • 101 + 1619 = 1720
  • 107 + 1613 = 1720
  • 113 + 1607 = 1720
  • 137 + 1583 = 1720

Showing the first eight; more decompositions exist.

Unicode codepoint
ڸ
U+06B8
Other letter (Lo)

UTF-8 encoding: DA B8 (2 bytes).

Lookup U+06B8 on Compart ↗ Lookup on FileFormat.Info ↗
Hex color
#0006B8
RGB(0, 6, 184)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.6.184.