640938420
640,938,420 is an even composite number composed of five prime numbers multiplied together.
640938420 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of two hundred seventy divisors.
Prime factorization of 640938420:
22 × 34 × 5 × 172 × 372
(2 × 2 × 3 × 3 × 3 × 3 × 5 × 17 × 17 × 37 × 37)See below for interesting mathematical facts about the number 640938420 from the Numbermatics database.
Names of 640938420
- Cardinal: 640938420 can be written as Six hundred forty million, nine hundred thirty-eight thousand, four hundred twenty.
Scientific notation
- Scientific notation: 6.4093842 × 108
Factors of 640938420
Divisors of 640938420
- Number of divisors d(n): 270
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Complete list of divisors:
1 2 3 4 5 6 9 10 12 15 17 18 20 27 30 34 36 37 45 51 54 60 68 74 81 85 90 102 108 111 135 148 153 162 170 180 185 204 222 255 270 289 306 324 333 340 370 405 444 459 510 540 555 578 612 629 666 740 765 810 867 918 999 1020 1110 1156 1258 1332 1369 1377 1445 1530 1620 1665 1734 1836 1887 1998 2220 2295 2516 2601 2738 2754 2890 2997 3060 3145 3330 3468 3774 3996 4107 4335 4590 4995 5202 5476 5508 5661 5780 5994 6290 6660 6845 6885 7548 7803 8214 8670 9180 9435 9990 10404 10693 11322 11988 12321 12580 13005 13690 13770 14985 15606 16428 16983 17340 18870 19980 20535 21386 22644 23273 23409 24642 26010 27380 27540 28305 29970 31212 32079 33966 36963 37740 39015 41070 42772 46546 46818 49284 50949 52020 53465 56610 59940 61605 64158 67932 69819 73926 78030 82140 84915 93092 93636 96237 101898 106930 110889 113220 116365 117045 123210 128316 139638 147852 156060 160395 169830 184815 192474 203796 209457 213860 221778 232730 234090 246420 254745 279276 288711 320790 339660 349095 369630 384948 395641 418914 443556 465460 468180 481185 509490 554445 577422 628371 641580 698190 739260 791282 837828 866133 962370 1018980 1047285 1108890 1154844 1186923 1256742 1396380 1443555 1582564 1732266 1885113 1924740 1978205 2094570 2217780 2373846 2513484 2887110 3141855 3464532 3560769 3770226 3956410 4189140 4330665 4747692 5774220 5934615 6283710 7121538 7540452 7912820 8661330 9425565 10682307 11869230 12567420 14243076 17322660 17803845 18851130 21364614 23738460 32046921 35607690 37702260 42729228 53411535 64093842 71215380 106823070 128187684 160234605 213646140 320469210 640938420
- Sum of all divisors σ(n): 2195164818
- Sum of proper divisors (its aliquot sum) s(n): 1554226398
- 640938420 is an abundant number, because the sum of its proper divisors (1554226398) is greater than itself. Its abundance is 913287978
Bases of 640938420
- Binary: 1001100011001111110001101101002
- Hexadecimal: 0x2633F1B4
- Base-36: ALLJ90
Squares and roots of 640938420
- 640938420 squared (6409384202) is 410802058232096400
- 640938420 cubed (6409384203) is 263298822136027859903688000
-
The
square root of 640938420 is 25316.7616412527 -
The
cube root of 640938420 is 862.1948712727
Scales and comparisons
How big is 640938420?- 640,938,420 seconds is equal to 20 years, 19 weeks, 5 days, 6 hours, 27 minutes.
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To count from 1 to 640,938,420 would take you about thirty 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 640938420 cubic inches would be around 71.8 feet tall.
Recreational maths with 640938420
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