18638629728

Names of 18638629728

• Cardinal: 18638629728 can be written as Eighteen billion, six hundred thirty-eight million, six hundred twenty-nine thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 1.8638629728 × 10¹⁰

Factors of 18638629728

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 4901

Divisors of 18638629728

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 4 6 8 12 16 17 19 24 32 34 38 48 51 57 68 76 96 102 114 127 136 152 204 228 254 272 304 323 381 408 456 508 544 608 646 762 816 912 969 1016 1292 1524 1632 1824 1938 2032 2159 2413 2584 3048 3876 4064 4318 4733 4826 5168 6096 6477 7239 7752 8636 9466 9652 10336 12192 12954 14199 14478 15504 17272 18932 19304 25908 28398 28956 31008 34544 37864 38608 41021 51816 56796 57912 69088 75728 77216 80461 82042 89927 103632 113592 115824 123063 151456 160922 164084 179854 207264 227184 231648 241383 246126 269781 321844 328168 359708 454368 482766 492252 539562 601091 643688 656336 719416 965532 984504 1079124 1202182 1287376 1312672 1438832 1528759 1803273 1931064 1969008 2158248 2404364 2574752 2877664 3057518 3606546 3862128 3938016 4316496 4586277 4808728 6115036 7213092 7724256 8632992 9172554 9617456 10218547 11420729 12230072 14426184 18345108 19234912 20437094 22841458 24460144 28852368 30655641 34262187 36690216 40874188 45682916 48920288 57704736 61311282 68524374 73380432 81748376 91365832 122622564 137048748 146760864 163496752 182731664 194152393 245245128 274097496 326993504 365463328 388304786 490490256 548194992 582457179 776609572 980980512 1096389984 1164914358 1553219144 2329828716 3106438288 4659657432 6212876576 9319314864 18638629728
• Sum of all divisors σ(n): 54971965440
• Sum of proper divisors (its aliquot sum) s(n): 36333335712
• 18638629728 is an abundant number, because the sum of its proper divisors (36333335712) is greater than itself. Its abundance is 17694705984

Bases of 18638629728

• Binary: 10001010110111100101110101101100000₂
• Hexadecimal: 0x456F2EB60
• Base-36: 8K8YIQO

Squares and roots of 18638629728

• 18638629728 squared (18638629728²) is 347398518137485353984
• 18638629728 cubed (18638629728³) is 6475032347620481709930785636352
• The square root of 18638629728 is 136523.3669669775
• The cube root of 18638629728 is 2651.3760376045

Scales and comparisons

• 18,638,629,728 seconds is equal to 592 years, 33 weeks, 5 days, 21 hours, 8 minutes, 48 seconds.
• To count from 1 to 18,638,629,728 would take you about one thousand, one hundred eighty-five years!

  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 18638629728 cubic inches would be around 220.9 feet tall.

Recreational maths with 18638629728

• 18638629728 backwards is 82792683681
• The number of decimal digits it has is: 11
• The sum of 18638629728's digits is 60
• More coming soon!