640381894740

Names of 640381894740

• Cardinal: 640381894740 can be written as Six hundred forty billion, three hundred eighty-one million, eight hundred ninety-four thousand, seven hundred forty.

Scientific notation

• Scientific notation: 6.4038189474 × 10¹¹

Factors of 640381894740

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 4270955

Divisors of 640381894740

• Number of divisors d(n): 216
• Complete list of divisors:
  1 2 3 4 5 6 7 9 10 12 14 15 17 18 20 21 28 30 34 35 36 42 45 49 51 60 63 68 70 84 85 90 98 102 105 119 126 140 147 153 170 180 196 204 210 238 245 252 255 294 306 315 340 357 420 441 476 490 510 588 595 612 630 714 735 765 833 882 980 1020 1071 1190 1260 1428 1470 1530 1666 1764 1785 2142 2205 2380 2499 2940 3060 3332 3570 4165 4284 4410 4998 5355 7140 7497 8330 8820 9996 10710 12495 14994 16660 21420 24990 29988 37485 49980 74970 149940 4270921 8541842 12812763 17083684 21354605 25625526 29896447 38438289 42709210 51251052 59792894 64063815 72605657 76876578 85418420 89689341 119585788 128127630 145211314 149482235 153753156 179378682 192191445 209275129 217816971 256255260 269068023 290422628 298964470 358757364 363028285 384382890 418550258 435633942 448446705 508239599 538136046 597928940 627825387 653450913 726056570 768765780 837100516 871267884 896893410 1016479198 1046375645 1076272092 1089084855 1255650774 1306901826 1345340115 1452113140 1524718797 1793786820 1883476161 2032958396 2092751290 2178169710 2511301548 2541197995 2613803652 2690680230 3049437594 3139126935 3267254565 3557677193 3766952322 4185502580 4356339420 4574156391 5082395990 5381360460 6098875188 6278253870 6534509130 7115354386 7533904644 7623593985 9148312782 9417380805 10164791980 10673031579 12556507740 13069018260 14230708772 15247187970 17788385965 18296625564 18834761610 21346063158 22870781955 30494375940 32019094737 35576771930 37669523220 42692126316 45741563910 53365157895 64038189474 71153543860 91483127820 106730315790 128076378948 160095473685 213460631580 320190947370 640381894740
• Sum of all divisors σ(n): 2392553420712
• Sum of proper divisors (its aliquot sum) s(n): 1752171525972
• 640381894740 is an abundant number, because the sum of its proper divisors (1752171525972) is greater than itself. Its abundance is 1111789631232

Bases of 640381894740

• Binary: 1001010100011001101111000100000001010100₂
• Hexadecimal: 0x9519BC4054
• Base-36: 866QUGD0

Squares and roots of 640381894740

• 640381894740 squared (640381894740²) is 410088971110792439667600
• 640381894740 cubed (640381894740³) is 262613552331906384977204823788424000
• The square root of 640381894740 is 800238.6486167735
• The cube root of 640381894740 is 8619.4525177915

Scales and comparisons

• 640,381,894,740 seconds is equal to 20,362 years, 8 weeks, 3 days, 11 hours, 39 minutes.
• To count from 1 to 640,381,894,740 would take you about forty thousand, seven hundred twenty-four 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 640381894740 cubic inches would be around 718.3 feet tall.

Recreational maths with 640381894740

• 640381894740 backwards is 047498183046
• The number of decimal digits it has is: 12
• The sum of 640381894740's digits is 54
• More coming soon!