18171972

Names of 18171972

• Cardinal: 18171972 can be written as Eighteen million, one hundred seventy-one thousand, nine hundred seventy-two.

Scientific notation

• Scientific notation: 1.8171972 × 10⁷

Factors of 18171972

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 68

Divisors of 18171972

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 6 7 9 12 13 14 18 21 26 27 28 36 39 42 43 52 54 63 78 84 86 91 108 117 126 129 156 172 182 189 234 252 258 273 301 351 364 378 387 468 516 546 559 602 702 756 774 819 903 1092 1118 1161 1204 1404 1548 1638 1677 1806 1849 2236 2322 2457 2709 3276 3354 3612 3698 3913 4644 4914 5031 5418 5547 6708 7396 7826 8127 9828 10062 10836 11094 11739 12943 15093 15652 16254 16641 20124 22188 23478 24037 25886 30186 32508 33282 35217 38829 46956 48074 49923 51772 60372 66564 70434 72111 77658 96148 99846 105651 116487 140868 144222 155316 168259 199692 211302 216333 232974 288444 336518 349461 422604 432666 465948 504777 648999 673036 698922 865332 1009554 1297998 1397844 1514331 2019108 2595996 3028662 4542993 6057324 9085986 18171972
• Sum of all divisors σ(n): 59364480
• Sum of proper divisors (its aliquot sum) s(n): 41192508
• 18171972 is an abundant number, because the sum of its proper divisors (41192508) is greater than itself. Its abundance is 23020536

Bases of 18171972

• Binary: 1000101010100100001000100₂
• Hexadecimal: 0x1154844
• Base-36: ATHL0

Squares and roots of 18171972

• 18171972 squared (18171972²) is 330220566368784
• 18171972 cubed (18171972³) is 6000758885877684522048
• The square root of 18171972 is 4262.8596035995
• The cube root of 18171972 is 262.9061142331

Scales and comparisons

• 18,171,972 seconds is equal to 30 weeks, 7 hours, 46 minutes, 12 seconds.
• To count from 1 to 18,171,972 would take you about forty-five 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 18171972 cubic inches would be around 21.9 feet tall.

Recreational maths with 18171972

• 18171972 backwards is 27917181
• 18171972 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 18171972's digits is 36
• More coming soon!