138787886720

Names of 138787886720

• Cardinal: 138787886720 can be written as One hundred thirty-eight billion, seven hundred eighty-seven million, eight hundred eighty-six thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 1.3878788672 × 10¹¹

Factors of 138787886720

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 659198

Divisors of 138787886720

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 4 5 7 8 10 14 16 20 28 32 35 40 47 56 64 70 80 94 112 128 140 160 188 224 235 280 320 329 376 448 470 560 640 658 752 896 940 1120 1316 1504 1645 1880 2240 2632 3008 3290 3760 4480 5264 6016 6580 7520 10528 13160 15040 21056 26320 30080 42112 52640 105280 210560 659137 1318274 2636548 3295685 4613959 5273096 6591370 9227918 10546192 13182740 18455836 21092384 23069795 26365480 30979439 36911672 42184768 46139590 52730960 61958878 73823344 84369536 92279180 105461920 123917756 147646688 154897195 184558360 210923840 216856073 247835512 295293376 309794390 369116720 421847680 433712146 495671024 590586752 619588780 738233440 867424292 991342048 1084280365 1239177560 1476466880 1734848584 1982684096 2168560730 2478355120 2952933760 3469697168 3965368192 4337121460 4956710240 6939394336 8674242920 9913420480 13878788672 17348485840 19826840960 27757577344 34696971680 69393943360 138787886720
• Sum of all divisors σ(n): 387256757760
• Sum of proper divisors (its aliquot sum) s(n): 248468871040
• 138787886720 is an abundant number, because the sum of its proper divisors (248468871040) is greater than itself. Its abundance is 109680984320

Bases of 138787886720

• Binary: 10000001010000011001110001011010000000₂
• Hexadecimal: 0x2050671680
• Base-36: 1RRAQ2RK

Squares and roots of 138787886720

• 138787886720 squared (138787886720²) is 19262077500203552358400
• 138787886720 cubed (138787886720³) is 2673343030090111401659208040448000
• The square root of 138787886720 is 372542.4629756989
• The cube root of 138787886720 is 5177.4651899409

Scales and comparisons

• 138,787,886,720 seconds is equal to 4,413 years, 1 week, 2 days, 6 hours, 45 minutes, 20 seconds.
• To count from 1 to 138,787,886,720 would take you about eight thousand, eight hundred twenty-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 138787886720 cubic inches would be around 431.5 feet tall.

Recreational maths with 138787886720

• 138787886720 backwards is 027688787831
• The number of decimal digits it has is: 12
• The sum of 138787886720's digits is 65
• More coming soon!