640686838400

Names of 640686838400

• Cardinal: 640686838400 can be written as Six hundred forty billion, six hundred eighty-six million, eight hundred thirty-eight thousand, four hundred.

Scientific notation

• Scientific notation: 6.406868384 × 10¹¹

Factors of 640686838400

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 140940

Divisors of 640686838400

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 4 5 7 8 10 14 16 20 25 28 29 32 35 40 49 50 56 58 64 70 80 98 100 112 116 128 140 145 160 175 196 200 203 224 232 245 280 290 320 350 392 400 406 448 464 490 560 580 640 700 725 784 800 812 896 928 980 1015 1120 1160 1225 1400 1421 1450 1568 1600 1624 1856 1960 2030 2240 2320 2450 2800 2842 2900 3136 3200 3248 3712 3920 4060 4480 4640 4900 5075 5600 5684 5800 6272 6496 7105 7840 8120 9280 9800 10150 11200 11368 11600 12992 14210 15680 16240 18560 19600 20300 22400 22736 23200 25984 28420 31360 32480 35525 39200 40600 45472 46400 56840 64960 71050 78400 81200 90944 92800 113680 129920 140897 142100 156800 162400 181888 227360 281794 284200 324800 454720 563588 568400 649600 704485 909440 986279 1127176 1136800 1408970 1972558 2254352 2273600 2817940 3522425 3945116 4086013 4508704 4547200 4931395 5635880 6903953 7044850 7890232 8172026 9017408 9862790 11271760 13807906 14089700 15780464 16344052 18034816 19725580 20430065 22543520 24656975 27615812 28179400 28602091 31560928 32688104 34519765 39451160 40860130 45087040 49313950 55231624 56358800 57204182 63121856 65376208 69039530 78902320 81720260 90174080 98627900 102150325 110463248 112717600 114408364 126243712 130752416 138079060 143010455 157804640 163440520 172598825 197255800 200214637 204300650 220926496 225435200 228816728 261504832 276158120 286020910 315609280 326881040 345197650 394511600 400429274 408601300 441852992 450870400 457633456 523009664 552316240 572041820 631218560 653762080 690395300 715052275 789023200 800858548 817202600 883705984 915266912 1001073185 1104632480 1144083640 1307524160 1380790600 1430104550 1578046400 1601717096 1634405200 1830533824 2002146370 2209264960 2288167280 2615048320 2761581200 2860209100 3156092800 3203434192 3268810400 3661067648 4004292740 4418529920 4576334560 5005365925 5523162400 5720418200 6406868384 6537620800 8008585480 9152669120 10010731850 11046324800 11440836400 12813736768 13075241600 16017170960 18305338240 20021463700 22092649600 22881672800 25627473536 32034341920 40042927400 45763345600 64068683840 80085854800 91526691200 128137367680 160171709600 320343419200 640686838400
• Sum of all divisors σ(n): 1904595759900
• Sum of proper divisors (its aliquot sum) s(n): 1263908921500
• 640686838400 is an abundant number, because the sum of its proper divisors (1263908921500) is greater than itself. Its abundance is 623222083100

Bases of 640686838400

• Binary: 1001010100101011111010010101001010000000₂
• Hexadecimal: 0x952BE95280
• Base-36: 86BSEGE8

Squares and roots of 640686838400

• 640686838400 squared (640686838400²) is 410479624898987714560000
• 640686838400 cubed (640686838400³) is 262988893104150358201888047104000000
• The square root of 640686838400 is 800429.1588891549
• The cube root of 640686838400 is 8620.8204673001

Scales and comparisons

• 640,686,838,400 seconds is equal to 20,371 years, 44 weeks, 4 days, 22 hours, 13 minutes, 20 seconds.
• To count from 1 to 640,686,838,400 would take you about forty thousand, seven hundred forty-three 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 640686838400 cubic inches would be around 718.4 feet tall.

Recreational maths with 640686838400

• 640686838400 backwards is 004838686046
• The number of decimal digits it has is: 12
• The sum of 640686838400's digits is 53
• More coming soon!