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Number

1,530

1,530 is a composite number, even, a calendar year.

Abundant Number Harshad / Niven Year

Properties

Parity
Even
Digit count
4
Digit sum
9
Digital root
9
Palindrome
No
Divisor count
24
σ(n) — sum of divisors
4,212

Primality

Prime factorization: 2 × 3 2 × 5 × 17

Divisors & multiples

All divisors (24)
1 · 2 · 3 · 5 · 6 · 9 · 10 · 15 · 17 · 18 · 30 · 34 · 45 · 51 · 85 · 90 · 102 · 153 · 170 · 255 · 306 · 510 · 765 · 1530
Aliquot sum (sum of proper divisors): 2,682
Factor pairs (a × b = 1,530)
1 × 1530
2 × 765
3 × 510
5 × 306
6 × 255
9 × 170
10 × 153
15 × 102
17 × 90
18 × 85
30 × 51
34 × 45
First multiples
1,530 · 3,060 · 4,590 · 6,120 · 7,650 · 9,180 · 10,710 · 12,240 · 13,770 · 15,300

Representations

In words
one thousand five hundred thirty
Ordinal
1530th
Roman numeral
MDXXX
Binary
10111111010
Octal
2772
Hexadecimal
5FA

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1530, here are decompositions:

  • 7 + 1523 = 1530
  • 19 + 1511 = 1530
  • 31 + 1499 = 1530
  • 37 + 1493 = 1530
  • 41 + 1489 = 1530
  • 43 + 1487 = 1530
  • 47 + 1483 = 1530
  • 59 + 1471 = 1530

Showing the first eight; more decompositions exist.

Hex color
#0005FA
RGB(0, 5, 250)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.5.250.