21739872

Names of 21739872

• Cardinal: 21739872 can be written as Twenty-one million, seven hundred thirty-nine thousand, eight hundred seventy-two.

Scientific notation

• Scientific notation: 2.1739872 × 10⁷

Factors of 21739872

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 213

Divisors of 21739872

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 4 6 7 8 11 12 14 16 17 21 22 24 28 32 33 34 42 44 48 51 56 66 68 77 84 88 96 102 112 119 132 136 154 168 173 176 187 204 224 231 238 264 272 308 336 346 352 357 374 408 462 476 519 528 544 561 616 672 692 714 748 816 924 952 1038 1056 1122 1211 1232 1309 1384 1428 1496 1632 1848 1903 1904 2076 2244 2422 2464 2618 2768 2856 2941 2992 3633 3696 3806 3808 3927 4152 4488 4844 5236 5536 5709 5712 5882 5984 7266 7392 7612 7854 8304 8823 8976 9688 10472 11418 11424 11764 13321 14532 15224 15708 16608 17646 17952 19376 20587 20944 22836 23528 26642 29064 30448 31416 32351 35292 38752 39963 41174 41888 45672 47056 53284 58128 60896 61761 62832 64702 70584 79926 82348 91344 94112 97053 106568 116256 123522 125664 129404 141168 159852 164696 182688 194106 213136 226457 247044 258808 282336 319704 329392 388212 426272 452914 494088 517616 639408 658784 679371 776424 905828 988176 1035232 1278816 1358742 1552848 1811656 1976352 2717484 3105696 3623312 5434968 7246624 10869936 21739872
• Sum of all divisors σ(n): 75769344
• Sum of proper divisors (its aliquot sum) s(n): 54029472
• 21739872 is an abundant number, because the sum of its proper divisors (54029472) is greater than itself. Its abundance is 32289600

Bases of 21739872

• Binary: 1010010111011100101100000₂
• Hexadecimal: 0x14BB960
• Base-36: CXYLC

Squares and roots of 21739872

• 21739872 squared (21739872²) is 472622034576384
• 21739872 cubed (21739872³) is 10274742536070162382848
• The square root of 21739872 is 4662.6035645335
• The cube root of 21739872 is 279.0951744259

Scales and comparisons

• 21,739,872 seconds is equal to 35 weeks, 6 days, 14 hours, 51 minutes, 12 seconds.
• To count from 1 to 21,739,872 would take you about six days!

  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 21739872 cubic inches would be around 23.3 feet tall.

Recreational maths with 21739872

• 21739872 backwards is 27893712
• The number of decimal digits it has is: 8
• The sum of 21739872's digits is 39
• More coming soon!