640402252920

Names of 640402252920

• Cardinal: 640402252920 can be written as Six hundred forty billion, four hundred two million, two hundred fifty-two thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 6.4040225292 × 10¹¹

Factors of 640402252920

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 136005

Divisors of 640402252920

• Number of divisors d(n): 256
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 17 18 20 24 27 30 34 36 40 45 51 54 60 68 72 85 90 102 108 120 135 136 153 170 180 204 216 255 257 270 306 340 360 408 459 510 514 540 612 680 765 771 918 1020 1028 1080 1224 1285 1530 1542 1836 2040 2056 2295 2313 2570 3060 3084 3672 3855 4369 4590 4626 5140 6120 6168 6939 7710 8738 9180 9252 10280 11565 13107 13878 15420 17476 18360 18504 21845 23130 26214 27756 30840 34695 34952 39321 43690 46260 52428 55512 65535 69390 78642 87380 92520 104856 117963 131070 135721 138780 157284 174760 196605 235926 262140 271442 277560 314568 393210 407163 471852 524280 542884 589815 678605 786420 814326 943704 1085768 1179630 1221489 1357210 1572840 1628652 2035815 2307257 2359260 2442978 2714420 3257304 3664467 4071630 4614514 4718520 4885956 5428840 6107445 6921771 7328934 8143260 9229028 9771912 11536285 12214890 13843542 14657868 16286520 18322335 18458056 20765313 23072570 24429780 27687084 29315736 34608855 34880297 36644670 41530626 46145140 48859560 55374168 62295939 69217710 69760594 73289340 83061252 92290280 103826565 104640891 124591878 138435420 139521188 146578680 166122504 174401485 207653130 209281782 249183756 276870840 279042376 311479695 313922673 348802970 415306260 418563564 498367512 523204455 592965049 622959390 627845346 697605940 830612520 837127128 941768019 1046408910 1185930098 1245918780 1255690692 1395211880 1569613365 1778895147 1883536038 2092817820 2371860196 2491837560 2511381384 2964825245 3139226730 3557790294 3767072076 4185635640 4708840095 4743720392 5336685441 5929650490 6278453460 7115580588 7534144152 8894475735 9417680190 10673370882 11859300980 12556906920 14231161176 16010056323 17788951470 18835360380 21346741764 23718601960 26683427205 32020112646 35577902940 37670720760 42693483528 53366854410 64040225292 71155805880 80050281615 106733708820 128080450584 160100563230 213467417640 320201126460 640402252920
• Sum of all divisors σ(n): 2269054684800
• Sum of proper divisors (its aliquot sum) s(n): 1628652431880
• 640402252920 is an abundant number, because the sum of its proper divisors (1628652431880) is greater than itself. Its abundance is 988250178960

Bases of 640402252920

• Binary: 1001010100011010111100101110010001111000₂
• Hexadecimal: 0x951AF2E478
• Base-36: 8672YSU0

Squares and roots of 640402252920

• 640402252920 squared (640402252920²) is 410115045545011648526400
• 640402252920 cubed (640402252920³) is 262638599123413868983949758097088000
• The square root of 640402252920 is 800251.3685836469
• The cube root of 640402252920 is 8619.5438562609

Scales and comparisons

• 640,402,252,920 seconds is equal to 20,362 years, 42 weeks, 1 day, 2 hours, 42 minutes.
• To count from 1 to 640,402,252,920 would take you about forty thousand, seven hundred twenty-five 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 640402252920 cubic inches would be around 718.3 feet tall.

Recreational maths with 640402252920

• 640402252920 backwards is 029252204046
• 640402252920 is a Harshad number.
• The number of decimal digits it has is: 12
• The sum of 640402252920's digits is 36
• More coming soon!