81825990
81,825,990 is an even composite number composed of six prime numbers multiplied together.
81825990 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of sixty-four divisors.
Prime factorization of 81825990:
2 × 3 × 5 × 43 × 137 × 463
See below for interesting mathematical facts about the number 81825990 from the Numbermatics database.
Names of 81825990
- Cardinal: 81825990 can be written as Eighty-one million, eight hundred twenty-five thousand, nine hundred ninety.
Scientific notation
- Scientific notation: 8.182599 × 107
Factors of 81825990
Divisors of 81825990
- Number of divisors d(n): 64
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Complete list of divisors:
1 2 3 5 6 10 15 30 43 86 129 137 215 258 274 411 430 463 645 685 822 926 1290 1370 1389 2055 2315 2778 4110 4630 5891 6945 11782 13890 17673 19909 29455 35346 39818 58910 59727 63431 88365 99545 119454 126862 176730 190293 199090 298635 317155 380586 597270 634310 951465 1902930 2727533 5455066 8182599 13637665 16365198 27275330 40912995 81825990
- Sum of all divisors σ(n): 202853376
- Sum of proper divisors (its aliquot sum) s(n): 121027386
- 81825990 is an abundant number, because the sum of its proper divisors (121027386) is greater than itself. Its abundance is 39201396
Bases of 81825990
- Binary: 1001110000010010000110001102
- Hexadecimal: 0x4E090C6
- Base-36: 1CPTC6
Squares and roots of 81825990
- 81825990 squared (818259902) is 6695492639480100
- 81825990 cubed (818259903) is 547865313763172267799000
-
The
square root of 81825990 is 9045.7719405255 -
The
cube root of 81825990 is 434.1406206885
Scales and comparisons
How big is 81825990?- 81,825,990 seconds is equal to 2 years, 31 weeks, 2 days, 1 hour, 26 minutes, 30 seconds.
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To count from 1 to 81,825,990 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 81825990 cubic inches would be around 36.2 feet tall.
Recreational maths with 81825990
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The information we have on file for 81825990 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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