138518640

Names of 138518640

• Cardinal: 138518640 can be written as One hundred thirty-eight million, five hundred eighteen thousand, six hundred forty.

Scientific notation

• Scientific notation: 1.3851864 × 10⁸

Factors of 138518640

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 4956

Divisors of 138518640

• Number of divisors d(n): 160
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 13 15 16 18 20 24 26 27 30 36 39 40 45 48 52 54 60 65 72 78 80 90 104 108 117 120 130 135 144 156 180 195 208 216 234 240 260 270 312 351 360 390 432 468 520 540 585 624 702 720 780 936 1040 1080 1170 1404 1560 1755 1872 2160 2340 2808 3120 3510 4680 4933 5616 7020 9360 9866 14040 14799 19732 24665 28080 29598 39464 44397 49330 59196 64129 73995 78928 88794 98660 118392 128258 133191 147990 177588 192387 197320 221985 236784 256516 266382 295980 320645 355176 384774 394640 443970 513032 532764 577161 591960 641290 665955 710352 769548 887940 961935 1026064 1065528 1154322 1183920 1282580 1331910 1539096 1731483 1775880 1923870 2131056 2308644 2565160 2663820 2885805 3078192 3462966 3551760 3847740 4617288 5130320 5327640 5771610 6925932 7695480 8657415 9234576 10655280 11543220 13851864 15390960 17314830 23086440 27703728 34629660 46172880 69259320 138518640
• Sum of all divisors σ(n): 513925440
• Sum of proper divisors (its aliquot sum) s(n): 375406800
• 138518640 is an abundant number, because the sum of its proper divisors (375406800) is greater than itself. Its abundance is 236888160

Bases of 138518640

• Binary: 1000010000011010000001110000₂
• Hexadecimal: 0x841A070
• Base-36: 2AGXO0

Squares and roots of 138518640

• 138518640 squared (138518640²) is 19187413627449600
• 138518640 cubed (138518640³) is 2657814440791785260544000
• The square root of 138518640 is 11769.3942070099
• The cube root of 138518640 is 517.4114950513

Scales and comparisons

• 138,518,640 seconds is equal to 4 years, 21 weeks, 5 hours, 24 minutes.
• To count from 1 to 138,518,640 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 138518640 cubic inches would be around 43.1 feet tall.

Recreational maths with 138518640

• 138518640 backwards is 046815831
• 138518640 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 138518640's digits is 36
• More coming soon!