640994816
640,994,816 is an even composite number composed of five prime numbers multiplied together.
640994816 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred sixty divisors.
Prime factorization of 640994816:
29 × 7 × 11 × 71 × 229
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 7 × 11 × 71 × 229)See below for interesting mathematical facts about the number 640994816 from the Numbermatics database.
Names of 640994816
- Cardinal: 640994816 can be written as Six hundred forty million, nine hundred ninety-four thousand, eight hundred sixteen.
Scientific notation
- Scientific notation: 6.40994816 × 108
Factors of 640994816
Divisors of 640994816
- Number of divisors d(n): 160
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Complete list of divisors:
1 2 4 7 8 11 14 16 22 28 32 44 56 64 71 77 88 112 128 142 154 176 224 229 256 284 308 352 448 458 497 512 568 616 704 781 896 916 994 1136 1232 1408 1562 1603 1792 1832 1988 2272 2464 2519 2816 3124 3206 3584 3664 3976 4544 4928 5038 5467 5632 6248 6412 7328 7952 9088 9856 10076 10934 12496 12824 14656 15904 16259 17633 18176 19712 20152 21868 24992 25648 29312 31808 32518 35266 36352 39424 40304 43736 49984 51296 58624 63616 65036 70532 80608 87472 99968 102592 113813 117248 127232 130072 141064 161216 174944 178849 199936 205184 227626 254464 260144 282128 322432 349888 357698 399872 410368 455252 520288 564256 644864 699776 715396 820736 910504 1040576 1128512 1251943 1289728 1399552 1430792 1821008 2081152 2257024 2503886 2799104 2861584 3642016 4162304 4514048 5007772 5723168 7284032 8324608 9028096 10015544 11446336 14568064 20031088 22892672 29136128 40062176 45785344 58272256 80124352 91570688 160248704 320497408 640994816
- Sum of all divisors σ(n): 1626324480
- Sum of proper divisors (its aliquot sum) s(n): 985329664
- 640994816 is an abundant number, because the sum of its proper divisors (985329664) is greater than itself. Its abundance is 344334848
Bases of 640994816
- Binary: 1001100011010011001110000000002
- Hexadecimal: 0x2634CE00
- Base-36: ALMQRK
Squares and roots of 640994816
- 640994816 squared (6409948162) is 410874354138873856
- 640994816 cubed (6409948163) is 263368331030366285773930496
-
The
square root of 640994816 is 25317.8754242927 -
The
cube root of 640994816 is 862.2201586297
Scales and comparisons
How big is 640994816?- 640,994,816 seconds is equal to 20 years, 19 weeks, 5 days, 22 hours, 6 minutes, 56 seconds.
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To count from 1 to 640,994,816 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 640994816 cubic inches would be around 71.9 feet tall.
Recreational maths with 640994816
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