138691644

Names of 138691644

• Cardinal: 138691644 can be written as One hundred thirty-eight million, six hundred ninety-one thousand, six hundred forty-four.

Scientific notation

• Scientific notation: 1.38691644 × 10⁸

Factors of 138691644

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 314

Divisors of 138691644

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 4 6 7 12 13 14 17 21 26 28 31 34 39 42 51 52 62 68 78 84 91 93 102 119 124 156 182 186 204 217 221 238 241 273 357 364 372 403 434 442 476 482 527 546 651 663 714 723 806 868 884 964 1054 1092 1209 1302 1326 1428 1446 1547 1581 1612 1687 2108 2418 2604 2652 2821 2892 3094 3133 3162 3374 3689 4097 4641 4836 5061 5642 6188 6266 6324 6748 6851 7378 7471 8194 8463 9282 9399 10122 11067 11284 12291 12532 13702 14756 14942 16388 16926 18564 18798 20244 20553 21931 22134 22413 24582 27404 28679 29884 33852 37596 41106 43862 44268 44826 47957 49164 52297 53261 57358 65793 82212 86037 87724 89652 95914 97123 104594 106522 114716 127007 131586 143871 156891 159783 172074 191828 194246 209188 213044 254014 263172 287742 291369 313782 319566 344148 372827 381021 388492 508028 575484 582738 627564 639132 679861 745654 762042 889049 1118481 1165476 1359722 1491308 1524084 1651091 1778098 2039583 2236962 2667147 2719444 3302182 3556196 4079166 4473924 4953273 5334294 6604364 8158332 9906546 10668588 11557637 19813092 23115274 34672911 46230548 69345822 138691644
• Sum of all divisors σ(n): 437133312
• Sum of proper divisors (its aliquot sum) s(n): 298441668
• 138691644 is an abundant number, because the sum of its proper divisors (298441668) is greater than itself. Its abundance is 159750024

Bases of 138691644

• Binary: 1000010001000100010000111100₂
• Hexadecimal: 0x844443C
• Base-36: 2AKN5O

Squares and roots of 138691644

• 138691644 squared (138691644²) is 19235372115422736
• 138691644 cubed (138691644³) is 2667785381639737010817984
• The square root of 138691644 is 11776.7416546341
• The cube root of 138691644 is 517.6268138889

Scales and comparisons

• 138,691,644 seconds is equal to 4 years, 21 weeks, 2 days, 5 hours, 27 minutes, 24 seconds.
• To count from 1 to 138,691,644 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 138691644 cubic inches would be around 43.1 feet tall.

Recreational maths with 138691644

• 138691644 backwards is 446196831
• 138691644 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 138691644's digits is 42
• More coming soon!