81349380
81,349,380 is an even composite number composed of five prime numbers multiplied together.
81349380 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of ninety-six divisors.
Prime factorization of 81349380:
22 × 33 × 5 × 7 × 21521
(2 × 2 × 3 × 3 × 3 × 5 × 7 × 21521)See below for interesting mathematical facts about the number 81349380 from the Numbermatics database.
Names of 81349380
- Cardinal: 81349380 can be written as Eighty-one million, three hundred forty-nine thousand, three hundred eighty.
Scientific notation
- Scientific notation: 8.134938 × 107
Factors of 81349380
Divisors of 81349380
- Number of divisors d(n): 96
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Complete list of divisors:
1 2 3 4 5 6 7 9 10 12 14 15 18 20 21 27 28 30 35 36 42 45 54 60 63 70 84 90 105 108 126 135 140 180 189 210 252 270 315 378 420 540 630 756 945 1260 1890 3780 21521 43042 64563 86084 107605 129126 150647 193689 215210 258252 301294 322815 387378 430420 451941 581067 602588 645630 753235 774756 903882 968445 1162134 1291260 1355823 1506470 1807764 1936890 2259705 2324268 2711646 2905335 3012940 3873780 4067469 4519410 5423292 5810670 6779115 8134938 9038820 11621340 13558230 16269876 20337345 27116460 40674690 81349380
- Sum of all divisors σ(n): 289255680
- Sum of proper divisors (its aliquot sum) s(n): 207906300
- 81349380 is an abundant number, because the sum of its proper divisors (207906300) is greater than itself. Its abundance is 126556920
Bases of 81349380
- Binary: 1001101100101001011000001002
- Hexadecimal: 0x4D94B04
- Base-36: 1CFLL0
Squares and roots of 81349380
- 81349380 squared (813493802) is 6617721626384400
- 81349380 cubed (813493803) is 538347551318962581672000
-
The
square root of 81349380 is 9019.3891145687 -
The
cube root of 81349380 is 433.2960691165
Scales and comparisons
How big is 81349380?- 81,349,380 seconds is equal to 2 years, 30 weeks, 3 days, 13 hours, 3 minutes.
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To count from 1 to 81,349,380 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 81349380 cubic inches would be around 36.1 feet tall.
Recreational maths with 81349380
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The information we have on file for 81349380 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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