138007215857

Names of 138007215857

• Cardinal: 138007215857 can be written as One hundred thirty-eight billion, seven million, two hundred fifteen thousand, eight hundred fifty-seven.

Scientific notation

• Scientific notation: 1.38007215857 × 10¹¹

Factors of 138007215857

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 567

Divisors of 138007215857

• Number of divisors d(n): 80
• Complete list of divisors:
  1 7 17 49 79 119 127 337 343 553 833 889 1343 2159 2359 2401 3871 5729 5831 6223 9401 10033 15113 16513 26623 27097 40103 40817 42799 43561 65807 70231 105791 115591 170561 186361 189679 280721 299593 304927 452591 460649 491617 727583 740537 809137 1193927 1304527 1965047 2097151 3168137 3224543 3381121 3441319 5093081 5183759 8357489 9131689 13755329 14680057 22176959 23667847 24089233 35651567 57479057 58502423 63921823 102760399 155238713 165674929 249560969 402353399 409516961 1086670991 1159724503 1746926783 2816473793 8118071521 19715316551 138007215857
• Sum of all divisors σ(n): 174502748160
• Sum of proper divisors (its aliquot sum) s(n): 36495532303
• 138007215857 is a deficient number, because the sum of its proper divisors (36495532303) is less than itself. Its deficiency is 101511683554

Bases of 138007215857

• Binary: 10000000100001110111101111111011110001₂
• Hexadecimal: 0x2021DEFEF1
• Base-36: 1REDXL9T

Squares and roots of 138007215857

• 138007215857 squared (138007215857²) is 19045991628600592244449
• 138007215857 cubed (138007215857³) is 2628484277898896908717713253027793
• The square root of 138007215857 is 371493.2245102191
• The cube root of 138007215857 is 5167.7393208855

Scales and comparisons

• 138,007,215,857 seconds is equal to 4,388 years, 10 weeks, 3 days, 17 hours, 44 minutes, 17 seconds.
• To count from 1 to 138,007,215,857 would take you about eight thousand, seven hundred seventy-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 138007215857 cubic inches would be around 430.6 feet tall.

Recreational maths with 138007215857

• 138007215857 backwards is 758512700831
• The number of decimal digits it has is: 12
• The sum of 138007215857's digits is 47
• More coming soon!