81396040
81,396,040 is an even composite number composed of five prime numbers multiplied together.
81396040 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of sixty-four divisors.
Prime factorization of 81396040:
23 × 5 × 11 × 29 × 6379
(2 × 2 × 2 × 5 × 11 × 29 × 6379)See below for interesting mathematical facts about the number 81396040 from the Numbermatics database.
Names of 81396040
- Cardinal: 81396040 can be written as Eighty-one million, three hundred ninety-six thousand and forty.
Scientific notation
- Scientific notation: 8.139604 × 107
Factors of 81396040
Divisors of 81396040
- Number of divisors d(n): 64
-
Complete list of divisors:
1 2 4 5 8 10 11 20 22 29 40 44 55 58 88 110 116 145 220 232 290 319 440 580 638 1160 1276 1595 2552 3190 6379 6380 12758 12760 25516 31895 51032 63790 70169 127580 140338 184991 255160 280676 350845 369982 561352 701690 739964 924955 1403380 1479928 1849910 2034901 2806760 3699820 4069802 7399640 8139604 10174505 16279208 20349010 40698020 81396040
- Sum of all divisors σ(n): 206712000
- Sum of proper divisors (its aliquot sum) s(n): 125315960
- 81396040 is an abundant number, because the sum of its proper divisors (125315960) is greater than itself. Its abundance is 43919920
Bases of 81396040
- Binary: 1001101101000000001010010002
- Hexadecimal: 0x4DA0148
- Base-36: 1CGLL4
Squares and roots of 81396040
- 81396040 squared (813960402) is 6625315327681600
- 81396040 cubed (813960403) is 539274431424584620864000
-
The
square root of 81396040 is 9021.9753934491 -
The
cube root of 81396040 is 433.3788959323
Scales and comparisons
How big is 81396040?- 81,396,040 seconds is equal to 2 years, 30 weeks, 4 days, 2 hours, 40 seconds.
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To count from 1 to 81,396,040 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 81396040 cubic inches would be around 36.1 feet tall.
Recreational maths with 81396040
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The information we have on file for 81396040 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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