81353120
81,353,120 is an even composite number composed of five prime numbers multiplied together.
81353120 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 81353120:
25 × 5 × 29 × 89 × 197
(2 × 2 × 2 × 2 × 2 × 5 × 29 × 89 × 197)See below for interesting mathematical facts about the number 81353120 from the Numbermatics database.
Names of 81353120
- Cardinal: 81353120 can be written as Eighty-one million, three hundred fifty-three thousand, one hundred twenty.
Scientific notation
- Scientific notation: 8.135312 × 107
Factors of 81353120
Divisors of 81353120
- Number of divisors d(n): 96
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Complete list of divisors:
1 2 4 5 8 10 16 20 29 32 40 58 80 89 116 145 160 178 197 232 290 356 394 445 464 580 712 788 890 928 985 1160 1424 1576 1780 1970 2320 2581 2848 3152 3560 3940 4640 5162 5713 6304 7120 7880 10324 11426 12905 14240 15760 17533 20648 22852 25810 28565 31520 35066 41296 45704 51620 57130 70132 82592 87665 91408 103240 114260 140264 175330 182816 206480 228520 280528 350660 412960 457040 508457 561056 701320 914080 1016914 1402640 2033828 2542285 2805280 4067656 5084570 8135312 10169140 16270624 20338280 40676560 81353120
- Sum of all divisors σ(n): 202078800
- Sum of proper divisors (its aliquot sum) s(n): 120725680
- 81353120 is an abundant number, because the sum of its proper divisors (120725680) is greater than itself. Its abundance is 39372560
Bases of 81353120
- Binary: 1001101100101011001101000002
- Hexadecimal: 0x4D959A0
- Base-36: 1CFOGW
Squares and roots of 81353120
- 81353120 squared (813531202) is 6618330133734400
- 81353120 cubed (813531203) is 538421805569310691328000
-
The
square root of 81353120 is 9019.5964433005 -
The
cube root of 81353120 is 433.3027092099
Scales and comparisons
How big is 81353120?- 81,353,120 seconds is equal to 2 years, 30 weeks, 3 days, 14 hours, 5 minutes, 20 seconds.
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To count from 1 to 81,353,120 would take you about 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 81353120 cubic inches would be around 36.1 feet tall.
Recreational maths with 81353120
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