81396090
81,396,090 is an even composite number composed of four prime numbers multiplied together.
81396090 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of sixty divisors.
Prime factorization of 81396090:
2 × 34 × 5 × 3172
(2 × 3 × 3 × 3 × 3 × 5 × 317 × 317)See below for interesting mathematical facts about the number 81396090 from the Numbermatics database.
Names of 81396090
- Cardinal: 81396090 can be written as Eighty-one million, three hundred ninety-six thousand and ninety.
Scientific notation
- Scientific notation: 8.139609 × 107
Factors of 81396090
Divisors of 81396090
- Number of divisors d(n): 60
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Complete list of divisors:
1 2 3 5 6 9 10 15 18 27 30 45 54 81 90 135 162 270 317 405 634 810 951 1585 1902 2853 3170 4755 5706 8559 9510 14265 17118 25677 28530 42795 51354 85590 100489 128385 200978 256770 301467 502445 602934 904401 1004890 1507335 1808802 2713203 3014670 4522005 5426406 8139609 9044010 13566015 16279218 27132030 40698045 81396090
- Sum of all divisors σ(n): 219557646
- Sum of proper divisors (its aliquot sum) s(n): 138161556
- 81396090 is an abundant number, because the sum of its proper divisors (138161556) is greater than itself. Its abundance is 56765466
Bases of 81396090
- Binary: 1001101101000000001011110102
- Hexadecimal: 0x4DA017A
- Base-36: 1CGLMI
Squares and roots of 81396090
- 81396090 squared (813960902) is 6625323467288100
- 81396090 cubed (813960903) is 539275425222494243529000
-
The
square root of 81396090 is 9021.9781644605 -
The
cube root of 81396090 is 433.3789846711
Scales and comparisons
How big is 81396090?- 81,396,090 seconds is equal to 2 years, 30 weeks, 4 days, 2 hours, 1 minute, 30 seconds.
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To count from 1 to 81,396,090 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 81396090 cubic inches would be around 36.1 feet tall.
Recreational maths with 81396090
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