640972120
640,972,120 is an even composite number composed of five prime numbers multiplied together.
640972120 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of ninety-six divisors.
Prime factorization of 640972120:
23 × 5 × 31 × 732 × 97
(2 × 2 × 2 × 5 × 31 × 73 × 73 × 97)See below for interesting mathematical facts about the number 640972120 from the Numbermatics database.
Names of 640972120
- Cardinal: 640972120 can be written as Six hundred forty million, nine hundred seventy-two thousand, one hundred twenty.
Scientific notation
- Scientific notation: 6.4097212 × 108
Factors of 640972120
Divisors of 640972120
- Number of divisors d(n): 96
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Complete list of divisors:
1 2 4 5 8 10 20 31 40 62 73 97 124 146 155 194 248 292 310 365 388 485 584 620 730 776 970 1240 1460 1940 2263 2920 3007 3880 4526 5329 6014 7081 9052 10658 11315 12028 14162 15035 18104 21316 22630 24056 26645 28324 30070 35405 42632 45260 53290 56648 60140 70810 90520 106580 120280 141620 165199 213160 219511 283240 330398 439022 516913 660796 825995 878044 1033826 1097555 1321592 1651990 1756088 2067652 2195110 2584565 3303980 4135304 4390220 5169130 6607960 8780440 10338260 16024303 20676520 32048606 64097212 80121515 128194424 160243030 320486060 640972120
- Sum of all divisors σ(n): 1524942720
- Sum of proper divisors (its aliquot sum) s(n): 883970600
- 640972120 is an abundant number, because the sum of its proper divisors (883970600) is greater than itself. Its abundance is 242998480
Bases of 640972120
- Binary: 1001100011010001110101010110002
- Hexadecimal: 0x26347558
- Base-36: ALM994
Squares and roots of 640972120
- 640972120 squared (6409721202) is 410845258617294400
- 640972120 cubed (6409721203) is 263340356407875460232128000
-
The
square root of 640972120 is 25317.4271994609 -
The
cube root of 640972120 is 862.2099821669
Scales and comparisons
How big is 640972120?- 640,972,120 seconds is equal to 20 years, 19 weeks, 5 days, 15 hours, 48 minutes, 40 seconds.
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To count from 1 to 640,972,120 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 640972120 cubic inches would be around 71.9 feet tall.
Recreational maths with 640972120
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