138697720

Names of 138697720

• Cardinal: 138697720 can be written as One hundred thirty-eight million, six hundred ninety-seven thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 1.3869772 × 10⁸

Factors of 138697720

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 93

Divisors of 138697720

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 4 5 7 8 10 14 19 20 28 29 31 35 38 40 56 58 62 70 76 95 116 124 133 140 145 152 155 190 203 217 232 248 266 280 290 310 380 406 434 532 551 580 589 620 665 760 812 841 868 899 1015 1064 1085 1102 1160 1178 1240 1330 1624 1682 1736 1798 2030 2170 2204 2356 2660 2755 2945 3364 3596 3857 4060 4123 4205 4340 4408 4495 4712 5320 5510 5887 5890 6293 6728 7192 7714 8120 8246 8410 8680 8990 11020 11774 11780 12586 15428 15979 16492 16820 17081 17980 19285 20615 22040 23548 23560 25172 26071 29435 30856 31465 31958 32984 33640 34162 35960 38570 41230 47096 50344 52142 58870 62930 63916 68324 77140 79895 82460 85405 104284 111853 117740 119567 125860 127832 130355 136648 154280 159790 164920 170810 182497 208568 223706 235480 239134 251720 260710 319580 341620 364994 447412 478268 495349 521420 559265 597835 639160 683240 729988 894824 912485 956536 990698 1042840 1118530 1195670 1459976 1824970 1981396 2237060 2391340 2476745 3467443 3649940 3962792 4474120 4782680 4953490 6934886 7299880 9906980 13869772 17337215 19813960 27739544 34674430 69348860 138697720
• Sum of all divisors σ(n): 401356800
• Sum of proper divisors (its aliquot sum) s(n): 262659080
• 138697720 is an abundant number, because the sum of its proper divisors (262659080) is greater than itself. Its abundance is 123961360

Bases of 138697720

• Binary: 1000010001000101101111111000₂
• Hexadecimal: 0x8445BF8
• Base-36: 2AKRUG

Squares and roots of 138697720

• 138697720 squared (138697720²) is 19237057533198400
• 138697720 cubed (138697720³) is 2668136019363442387648000
• The square root of 138697720 is 11776.9996178993
• The cube root of 138697720 is 517.6343727547

Scales and comparisons

• 138,697,720 seconds is equal to 4 years, 21 weeks, 2 days, 7 hours, 8 minutes, 40 seconds.
• To count from 1 to 138,697,720 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 138697720 cubic inches would be around 43.1 feet tall.

Recreational maths with 138697720

• 138697720 backwards is 027796831
• The number of decimal digits it has is: 9
• The sum of 138697720's digits is 43
• More coming soon!