72121189938

Names of 72121189938

• Cardinal: 72121189938 can be written as Seventy-two billion, one hundred twenty-one million, one hundred eighty-nine thousand, nine hundred thirty-eight.

Scientific notation

• Scientific notation: 7.2121189938 × 10¹⁰

Factors of 72121189938

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 40072

Divisors of 72121189938

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 6 7 14 19 21 31 38 42 57 62 73 93 114 133 146 186 217 219 266 399 434 438 511 589 651 798 1022 1178 1302 1387 1533 1767 2263 2774 3066 3534 4123 4161 4526 6789 8246 8322 9709 12369 13578 15841 19418 24738 29127 31682 39937 42997 47523 58254 79874 85994 95046 119811 128991 239622 257982 279559 300979 559118 601958 758803 838677 902937 1238047 1517606 1677354 1805874 2276409 2476094 2915401 3714141 4552818 5311621 5830802 7428282 8666329 8746203 10623242 15934863 17332658 17492406 20407807 23522893 25998987 31869726 40815614 47045786 51997974 55392619 61223421 70568679 90377431 110785238 122446842 141137358 164660251 166177857 180754862 271132293 329320502 332355714 387748333 493980753 542264586 632642017 775496666 987961506 1163244999 1265284034 1717171189 1897926051 2326489998 3434342378 3795852102 5151513567 10303027134 12020198323 24040396646 36060594969 72121189938
• Sum of all divisors σ(n): 181580513280
• Sum of proper divisors (its aliquot sum) s(n): 109459323342
• 72121189938 is an abundant number, because the sum of its proper divisors (109459323342) is greater than itself. Its abundance is 37338133404

Bases of 72121189938

• Binary: 1000011001010110000100000011000110010₂
• Hexadecimal: 0x10CAC20632
• Base-36: X4R3EB6

Squares and roots of 72121189938

• 72121189938 squared (72121189938²) is 5201466038073072443844
• 72121189938 cubed (72121189938³) is 375135920087924397245706962841672
• The square root of 72121189938 is 268553.8864697365
• The cube root of 72121189938 is 4162.5004602295

Scales and comparisons

• 72,121,189,938 seconds is equal to 2,293 years, 11 weeks, 6 days, 23 hours, 52 minutes, 18 seconds.
• To count from 1 to 72,121,189,938 would take you about four thousand, five hundred eighty-six 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 72121189938 cubic inches would be around 346.9 feet tall.

Recreational maths with 72121189938

• 72121189938 backwards is 83998112127
• The number of decimal digits it has is: 11
• The sum of 72121189938's digits is 51
• More coming soon!