1388157680

Names of 1388157680

• Cardinal: 1388157680 can be written as One billion, three hundred eighty-eight million, one hundred fifty-seven thousand, six hundred eighty.

Scientific notation

• Scientific notation: 1.38815768 × 10⁹

Factors of 1388157680

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 6209

Divisors of 1388157680

• Number of divisors d(n): 160
• Complete list of divisors:
  1 2 4 5 7 8 10 13 14 16 20 26 28 31 35 40 52 56 62 65 70 80 91 104 112 124 130 140 155 182 208 217 248 260 280 310 364 403 434 455 496 520 560 620 728 806 868 910 1040 1085 1240 1456 1612 1736 1820 2015 2170 2480 2821 3224 3472 3640 4030 4340 5642 6151 6448 7280 8060 8680 11284 12302 14105 16120 17360 22568 24604 28210 30755 32240 43057 45136 49208 56420 61510 79963 86114 98416 112840 123020 159926 172228 190681 215285 225680 246040 319852 344456 381362 399815 430570 492080 559741 639704 688912 762724 799630 861140 953405 1119482 1279408 1334767 1525448 1599260 1722280 1906810 2238964 2478853 2669534 2798705 3050896 3198520 3444560 3813620 4477928 4957706 5339068 5597410 6397040 6673835 7627240 8955856 9915412 10678136 11194820 12394265 13347670 15254480 17351971 19830824 21356272 22389640 24788530 26695340 34703942 39661648 44779280 49577060 53390680 69407884 86759855 99154120 106781360 138815768 173519710 198308240 277631536 347039420 694078840 1388157680
• Sum of all divisors σ(n): 4101070848
• Sum of proper divisors (its aliquot sum) s(n): 2712913168
• 1388157680 is an abundant number, because the sum of its proper divisors (2712913168) is greater than itself. Its abundance is 1324755488

Bases of 1388157680

• Binary: 1010010101111011001101011110000₂
• Hexadecimal: 0x52BD9AF0
• Base-36: MYH1BK

Squares and roots of 1388157680

• 1388157680 squared (1388157680²) is 1926981744542982400
• 1388157680 cubed (1388157680³) is 2674954507907139108664832000
• The square root of 1388157680 is 37257.9881367741
• The cube root of 1388157680 is 1115.5257509701

Scales and comparisons

• 1,388,157,680 seconds is equal to 44 years, 7 weeks, 1 day, 15 hours, 21 minutes, 20 seconds.
• To count from 1 to 1,388,157,680 would take you about eighty-eight 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 1388157680 cubic inches would be around 93 feet tall.

Recreational maths with 1388157680

• 1388157680 backwards is 0867518831
• The number of decimal digits it has is: 10
• The sum of 1388157680's digits is 47
• More coming soon!