81997120
81,997,120 is an even composite number composed of four prime numbers multiplied together.
81997120 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of fifty-six divisors.
Prime factorization of 81997120:
26 × 5 × 17 × 15073
(2 × 2 × 2 × 2 × 2 × 2 × 5 × 17 × 15073)See below for interesting mathematical facts about the number 81997120 from the Numbermatics database.
Names of 81997120
- Cardinal: 81997120 can be written as Eighty-one million, nine hundred ninety-seven thousand, one hundred twenty.
Scientific notation
- Scientific notation: 8.199712 × 107
Factors of 81997120
Divisors of 81997120
- Number of divisors d(n): 56
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Complete list of divisors:
1 2 4 5 8 10 16 17 20 32 34 40 64 68 80 85 136 160 170 272 320 340 544 680 1088 1360 2720 5440 15073 30146 60292 75365 120584 150730 241168 256241 301460 482336 512482 602920 964672 1024964 1205840 1281205 2049928 2411680 2562410 4099856 4823360 5124820 8199712 10249640 16399424 20499280 40998560 81997120
- Sum of all divisors σ(n): 206754984
- Sum of proper divisors (its aliquot sum) s(n): 124757864
- 81997120 is an abundant number, because the sum of its proper divisors (124757864) is greater than itself. Its abundance is 42760744
Bases of 81997120
- Binary: 1001110001100101101010000002
- Hexadecimal: 0x4E32D40
- Base-36: 1CTHDS
Squares and roots of 81997120
- 81997120 squared (819971202) is 6723527688294400
- 81997120 cubed (819971203) is 551309906680398512128000
-
The
square root of 81997120 is 9055.2261153435 -
The
cube root of 81997120 is 434.4430622951
Scales and comparisons
How big is 81997120?- 81,997,120 seconds is equal to 2 years, 31 weeks, 4 days, 58 minutes, 40 seconds.
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To count from 1 to 81,997,120 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 81997120 cubic inches would be around 36.2 feet tall.
Recreational maths with 81997120
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The information we have on file for 81997120 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!
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