138439855477

Names of 138439855477

• Cardinal: 138439855477 can be written as One hundred thirty-eight billion, four hundred thirty-nine million, eight hundred fifty-five thousand, four hundred seventy-seven.

Scientific notation

• Scientific notation: 1.38439855477 × 10¹¹

Factors of 138439855477

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 456

Divisors of 138439855477

• Number of divisors d(n): 72
• Complete list of divisors:
  1 7 11 19 49 77 121 133 209 343 419 539 847 931 1463 2299 2933 3773 4609 5929 6517 7961 10241 16093 20531 32263 41503 50699 55727 71687 87571 112651 143717 175561 225841 354893 390089 612997 788557 963281 1228927 1580887 1931171 2484251 2730623 3335659 4290979 6742967 8602489 13518197 17389757 21242881 23349613 30036853 36692249 47200769 60217423 94627379 148700167 163447291 256845743 330405383 403614739 662391653 1040901169 1144131037 1797920201 2825303173 7286308183 12585441407 19777122211 138439855477
• Sum of all divisors σ(n): 187243784000
• Sum of proper divisors (its aliquot sum) s(n): 48803928523
• 138439855477 is a deficient number, because the sum of its proper divisors (48803928523) is less than itself. Its deficiency is 89635926954

Bases of 138439855477

• Binary: 10000000111011101010001000110101110101₂
• Hexadecimal: 0x203BA88D75
• Base-36: 1RLJIK51

Squares and roots of 138439855477

• 138439855477 squared (138439855477²) is 19165593584492646897529
• 138439855477 cubed (138439855477³) is 2653282005968080424863107188416333
• The square root of 138439855477 is 372075.0669918639
• The cube root of 138439855477 is 5173.1338130371

Scales and comparisons

• 138,439,855,477 seconds is equal to 4,401 years, 49 weeks, 6 days, 3 hours, 24 minutes, 37 seconds.
• To count from 1 to 138,439,855,477 would take you about eight thousand, eight hundred three 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 138439855477 cubic inches would be around 431.1 feet tall.

Recreational maths with 138439855477

• 138439855477 backwards is 774558934831
• The number of decimal digits it has is: 12
• The sum of 138439855477's digits is 64
• More coming soon!