138979391390

Names of 138979391390

• Cardinal: 138979391390 can be written as One hundred thirty-eight billion, nine hundred seventy-nine million, three hundred ninety-one thousand, three hundred ninety.

Scientific notation

• Scientific notation: 1.3897939139 × 10¹¹

Factors of 138979391390

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 2132600

Divisors of 138979391390

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 5 7 10 14 19 35 38 49 70 95 98 133 190 245 266 343 490 665 686 931 1330 1715 1862 3430 4655 6517 9310 13034 32585 65170 2132567 4265134 10662835 14927969 21325670 29855938 40518773 74639845 81037546 104495783 149279690 202593865 208991566 283631411 405187730 522478915 567262822 731470481 1044957830 1418157055 1462940962 1985419877 2836314110 3657352405 3970839754 7314704810 9927099385 13897939139 19854198770 27795878278 69489695695 138979391390
• Sum of all divisors σ(n): 307089792000
• Sum of proper divisors (its aliquot sum) s(n): 168110400610
• 138979391390 is an abundant number, because the sum of its proper divisors (168110400610) is greater than itself. Its abundance is 29131009220

Bases of 138979391390

• Binary: 10000001011011110100010011011110011110₂
• Hexadecimal: 0x205BD1379E
• Base-36: 1RUGQOPQ

Squares and roots of 138979391390

• 138979391390 squared (138979391390²) is 19315271231134806132100
• 138979391390 cubed (138979391390³) is 2684424640235891375284897942619000
• The square root of 138979391390 is 372799.3983230123
• The cube root of 138979391390 is 5179.8454482741

Scales and comparisons

• 138,979,391,390 seconds is equal to 4,419 years, 5 weeks, 6 days, 18 hours, 29 minutes, 50 seconds.
• To count from 1 to 138,979,391,390 would take you about eight thousand, eight hundred thirty-eight 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 138979391390 cubic inches would be around 431.7 feet tall.

Recreational maths with 138979391390

• 138979391390 backwards is 093193979831
• The number of decimal digits it has is: 12
• The sum of 138979391390's digits is 62
• More coming soon!