138509918730

Names of 138509918730

• Cardinal: 138509918730 can be written as One hundred thirty-eight billion, five hundred nine million, nine hundred eighteen thousand, seven hundred thirty.

Scientific notation

• Scientific notation: 1.3850991873 × 10¹¹

Factors of 138509918730

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 310

Divisors of 138509918730

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 5 6 9 10 15 18 27 30 45 54 90 135 149 151 270 298 302 447 453 745 755 894 906 1341 1359 1490 1510 2235 2265 2682 2718 4023 4077 4470 4530 6705 6795 8046 8154 13410 13590 20115 20385 22499 22801 40230 40770 44998 45602 67497 68403 112495 114005 134994 136806 202491 205209 224990 228010 337485 342015 404982 410418 607473 615627 674970 684030 1012455 1026045 1214946 1231254 2024910 2052090 3037365 3078135 3397349 3442951 6074730 6156270 6794698 6885902 10192047 10328853 16986745 17214755 20384094 20657706 30576141 30986559 33973490 34429510 50960235 51644265 61152282 61973118 91728423 92959677 101920470 103288530 152880705 154932795 183456846 185919354 305761410 309865590 458642115 464798385 512999699 917284230 929596770 1025999398 1538999097 2564998495 3077998194 4616997291 5129996990 7694995485 9233994582 13850991873 15389990970 23084986455 27701983746 46169972910 69254959365 138509918730
• Sum of all divisors σ(n): 374317632000
• Sum of proper divisors (its aliquot sum) s(n): 235807713270
• 138509918730 is an abundant number, because the sum of its proper divisors (235807713270) is greater than itself. Its abundance is 97297794540

Bases of 138509918730

• Binary: 10000000111111110101011010001000001010₂
• Hexadecimal: 0x203FD5A20A
• Base-36: 1RMP89AI

Squares and roots of 138509918730

• 138509918730 squared (138509918730²) is 19184997586591204812900
• 138509918730 cubed (138509918730³) is 2657312456553993916367563855617000
• The square root of 138509918730 is 372169.2071222443
• The cube root of 138509918730 is 5174.0063591097

Scales and comparisons

• 138,509,918,730 seconds is equal to 4,404 years, 9 weeks, 5 days, 1 hour, 25 minutes, 30 seconds.
• To count from 1 to 138,509,918,730 would take you about eight thousand, eight hundred 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 138509918730 cubic inches would be around 431.2 feet tall.

Recreational maths with 138509918730

• 138509918730 backwards is 037819905831
• 138509918730 is a Harshad number.
• The number of decimal digits it has is: 12
• The sum of 138509918730's digits is 54
• More coming soon!