81362820
81,362,820 is an even composite number composed of six prime numbers multiplied together.
81362820 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of one hundred forty-four divisors.
Prime factorization of 81362820:
22 × 3 × 5 × 7 × 112 × 1601
(2 × 2 × 3 × 5 × 7 × 11 × 11 × 1601)See below for interesting mathematical facts about the number 81362820 from the Numbermatics database.
Names of 81362820
- Cardinal: 81362820 can be written as Eighty-one million, three hundred sixty-two thousand, eight hundred twenty.
Scientific notation
- Scientific notation: 8.136282 × 107
Factors of 81362820
Divisors of 81362820
- Number of divisors d(n): 144
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Complete list of divisors:
1 2 3 4 5 6 7 10 11 12 14 15 20 21 22 28 30 33 35 42 44 55 60 66 70 77 84 105 110 121 132 140 154 165 210 220 231 242 308 330 363 385 420 462 484 605 660 726 770 847 924 1155 1210 1452 1540 1601 1694 1815 2310 2420 2541 3202 3388 3630 4235 4620 4803 5082 6404 7260 8005 8470 9606 10164 11207 12705 16010 16940 17611 19212 22414 24015 25410 32020 33621 35222 44828 48030 50820 52833 56035 67242 70444 88055 96060 105666 112070 123277 134484 168105 176110 193721 211332 224140 246554 264165 336210 352220 369831 387442 493108 528330 581163 616385 672420 739662 774884 968605 1056660 1162326 1232770 1356047 1479324 1849155 1937210 2324652 2465540 2712094 2905815 3698310 3874420 4068141 5424188 5811630 6780235 7396620 8136282 11623260 13560470 16272564 20340705 27120940 40681410 81362820
- Sum of all divisors σ(n): 286360704
- Sum of proper divisors (its aliquot sum) s(n): 204997884
- 81362820 is an abundant number, because the sum of its proper divisors (204997884) is greater than itself. Its abundance is 123635064
Bases of 81362820
- Binary: 1001101100101111111100001002
- Hexadecimal: 0x4D97F84
- Base-36: 1CFVYC
Squares and roots of 81362820
- 81362820 squared (813628202) is 6619908478352400
- 81362820 cubed (813628203) is 538614421940660217768000
-
The
square root of 81362820 is 9020.1341453439 -
The
cube root of 81362820 is 433.3199298945
Scales and comparisons
How big is 81362820?- 81,362,820 seconds is equal to 2 years, 30 weeks, 3 days, 16 hours, 47 minutes.
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To count from 1 to 81,362,820 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 81362820 cubic inches would be around 36.1 feet tall.
Recreational maths with 81362820
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The information we have on file for 81362820 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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