138987030

Names of 138987030

• Cardinal: 138987030 can be written as One hundred thirty-eight million, nine hundred eighty-seven thousand and thirty.

Scientific notation

• Scientific notation: 1.3898703 × 10⁸

Factors of 138987030

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 1069

Divisors of 138987030

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 5 6 7 10 13 14 15 21 26 30 35 39 42 49 65 70 78 91 98 105 130 147 182 195 210 245 273 294 343 390 455 490 546 637 686 735 910 1029 1039 1274 1365 1470 1715 1911 2058 2078 2730 3117 3185 3430 3822 4459 5145 5195 6234 6370 7273 8918 9555 10290 10390 13377 13507 14546 15585 19110 21819 22295 26754 27014 31170 36365 40521 43638 44590 50911 66885 67535 72730 81042 94549 101822 109095 133770 135070 152733 189098 202605 218190 254555 283647 305466 356377 405210 472745 509110 567294 661843 712754 763665 945490 1069131 1323686 1418235 1527330 1781885 1985529 2138262 2836470 3309215 3563770 3971058 4632901 5345655 6618430 9265802 9927645 10691310 13898703 19855290 23164505 27797406 46329010 69493515 138987030
• Sum of all divisors σ(n): 419328000
• Sum of proper divisors (its aliquot sum) s(n): 280340970
• 138987030 is an abundant number, because the sum of its proper divisors (280340970) is greater than itself. Its abundance is 141353940

Bases of 138987030

• Binary: 1000010010001100011000010110₂
• Hexadecimal: 0x848C616
• Base-36: 2AQZ2U

Squares and roots of 138987030

• 138987030 squared (138987030²) is 19317394508220900
• 138987030 cubed (138987030³) is 2684867290035933474927000
• The square root of 138987030 is 11789.2760591987
• The cube root of 138987030 is 517.9940345063

Scales and comparisons

• 138,987,030 seconds is equal to 4 years, 21 weeks, 5 days, 15 hours, 30 minutes, 30 seconds.
• To count from 1 to 138,987,030 would take you about 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 138987030 cubic inches would be around 43.2 feet tall.

Recreational maths with 138987030

• 138987030 backwards is 030789831
• 138987030 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 138987030's digits is 39
• More coming soon!