138388779690

Names of 138388779690

• Cardinal: 138388779690 can be written as One hundred thirty-eight billion, three hundred eighty-eight million, seven hundred seventy-nine thousand, six hundred ninety.

Scientific notation

• Scientific notation: 1.3838877969 × 10¹¹

Factors of 138388779690

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 1380

Divisors of 138388779690

• Number of divisors d(n): 256
• Complete list of divisors:
  1 2 3 5 6 7 10 14 15 21 30 35 41 42 49 70 82 98 105 123 147 205 210 245 246 287 294 331 343 410 490 574 615 662 686 735 861 991 993 1029 1230 1435 1470 1655 1715 1722 1982 1986 2009 2058 2317 2870 2973 3310 3430 4018 4305 4634 4955 4965 5145 5946 6027 6937 6951 8610 9910 9930 10045 10290 11585 12054 13571 13874 13902 14063 14865 16219 20090 20811 23170 27142 28126 29730 30135 32438 34685 34755 40631 40713 41622 42189 48559 48657 60270 67855 69370 69510 70315 81095 81262 81426 84378 94997 97118 97314 104055 113533 121893 135710 140630 145677 162190 189994 203155 203565 208110 210945 227066 242795 243285 243786 284417 284991 291354 328021 339913 340599 406310 407130 421890 474985 485590 486570 567665 568834 569982 609465 656042 664979 679826 681198 728385 853251 949970 984063 1019739 1135330 1218930 1329958 1422085 1424955 1456770 1640105 1699565 1702995 1706502 1968126 1990919 1994937 2039478 2296147 2844170 2849910 3280210 3324895 3399130 3405990 3981838 3989874 4266255 4592294 4654853 4920315 5098695 5972757 6649790 6888441 8532510 9309706 9840630 9954595 9974685 10197390 11480735 11945514 13448861 13776882 13936433 13964559 16073029 19909190 19949370 22961470 23274265 26897722 27872866 27929118 29863785 32146058 34442205 40346583 41809299 46548530 48219087 59727570 67244305 68884410 69682165 69822795 80365145 80693166 83618598 94142027 96438174 112511203 134488610 139364330 139645590 160730290 188284054 201732915 209046495 225022406 241095435 282426081 337533609 403465830 418092990 470710135 482190870 562556015 564852162 658994189 675067218 941420270 1125112030 1317988378 1412130405 1687668045 1976982567 2824260810 3294970945 3375336090 3953965134 4612959323 6589941890 9225918646 9884912835 13838877969 19769825670 23064796615 27677755938 46129593230 69194389845 138388779690
• Sum of all divisors σ(n): 398374502400
• Sum of proper divisors (its aliquot sum) s(n): 259985722710
• 138388779690 is an abundant number, because the sum of its proper divisors (259985722710) is greater than itself. Its abundance is 121596943020

Bases of 138388779690

• Binary: 10000000111000100111010011001010101010₂
• Hexadecimal: 0x20389D32AA
• Base-36: 1RKP3TT6

Squares and roots of 138388779690

• 138388779690 squared (138388779690²) is 19151454344087356496100
• 138388779690 cubed (138388779690³) is 2650346395966998632253273244209000
• The square root of 138388779690 is 372006.4242590441
• The cube root of 138388779690 is 5172.4975454429

Scales and comparisons

• 138,388,779,690 seconds is equal to 4,400 years, 17 weeks, 2 days, 23 hours, 41 minutes, 30 seconds.
• To count from 1 to 138,388,779,690 would take you about eight thousand, eight hundred 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 138388779690 cubic inches would be around 431 feet tall.

Recreational maths with 138388779690

• 138388779690 backwards is 096977883831
• The number of decimal digits it has is: 12
• The sum of 138388779690's digits is 69
• More coming soon!