13221872

Names of 13221872

• Cardinal: 13221872 can be written as Thirteen million, two hundred twenty-one thousand, eight hundred seventy-two.

Scientific notation

• Scientific notation: 1.3221872 × 10⁷

Factors of 13221872

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 136

Divisors of 13221872

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 4 8 16 19 23 31 38 46 61 62 76 92 122 124 152 184 244 248 304 368 437 488 496 589 713 874 976 1159 1178 1403 1426 1748 1891 2318 2356 2806 2852 3496 3782 4636 4712 5612 5704 6992 7564 9272 9424 11224 11408 13547 15128 18544 22448 26657 27094 30256 35929 43493 53314 54188 71858 86986 106628 108376 143716 173972 213256 216752 287432 347944 426512 574864 695888 826367 1652734 3305468 6610936 13221872
• Sum of all divisors σ(n): 29521920
• Sum of proper divisors (its aliquot sum) s(n): 16300048
• 13221872 is an abundant number, because the sum of its proper divisors (16300048) is greater than itself. Its abundance is 3078176

Bases of 13221872

• Binary: 110010011011111111110000₂
• Hexadecimal: 0xC9BFF0
• Base-36: 7VE28

Squares and roots of 13221872

• 13221872 squared (13221872²) is 174817899184384
• 13221872 cubed (13221872³) is 2311419886324829646848
• The square root of 13221872 is 3636.1892139987
• The cube root of 13221872 is 236.4636103531

Scales and comparisons

• 13,221,872 seconds is equal to 21 weeks, 6 days, 44 minutes, 32 seconds.
• To count from 1 to 13,221,872 would take you about thirty-two weeks!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 13221872 cubic inches would be around 19.7 feet tall.

Recreational maths with 13221872

• 13221872 backwards is 27812231
• The number of decimal digits it has is: 8
• The sum of 13221872's digits is 26
• More coming soon!