81497728
81,497,728 is an even composite number composed of five prime numbers multiplied together.
81497728 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred twenty-eight divisors.
Prime factorization of 81497728:
27 × 13 × 17 × 43 × 67
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 13 × 17 × 43 × 67)See below for interesting mathematical facts about the number 81497728 from the Numbermatics database.
Names of 81497728
- Cardinal: 81497728 can be written as Eighty-one million, four hundred ninety-seven thousand, seven hundred twenty-eight.
Scientific notation
- Scientific notation: 8.1497728 × 107
Factors of 81497728
Divisors of 81497728
- Number of divisors d(n): 128
-
Complete list of divisors:
1 2 4 8 13 16 17 26 32 34 43 52 64 67 68 86 104 128 134 136 172 208 221 268 272 344 416 442 536 544 559 688 731 832 871 884 1072 1088 1118 1139 1376 1462 1664 1742 1768 2144 2176 2236 2278 2752 2881 2924 3484 3536 4288 4472 4556 5504 5762 5848 6968 7072 8576 8944 9112 9503 11524 11696 13936 14144 14807 17888 18224 19006 23048 23392 27872 28288 29614 35776 36448 37453 38012 46096 46784 48977 55744 59228 71552 72896 74906 76024 92192 93568 97954 111488 118456 145792 149812 152048 184384 195908 236912 299624 304096 368768 391816 473824 599248 608192 636701 783632 947648 1198496 1216384 1273402 1567264 1895296 2396992 2546804 3134528 4793984 5093608 6269056 10187216 20374432 40748864 81497728
- Sum of all divisors σ(n): 192265920
- Sum of proper divisors (its aliquot sum) s(n): 110768192
- 81497728 is an abundant number, because the sum of its proper divisors (110768192) is greater than itself. Its abundance is 29270464
Bases of 81497728
- Binary: 1001101101110001110100000002
- Hexadecimal: 0x4DB8E80
- Base-36: 1CIS1S
Squares and roots of 81497728
- 81497728 squared (814977282) is 6641879669161984
- 81497728 cubed (814977283) is 541298102686093359972352
-
The
square root of 81497728 is 9027.6092073151 -
The
cube root of 81497728 is 433.5592941185
Scales and comparisons
How big is 81497728?- 81,497,728 seconds is equal to 2 years, 30 weeks, 5 days, 6 hours, 15 minutes, 28 seconds.
-
To count from 1 to 81,497,728 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 81497728 cubic inches would be around 36.1 feet tall.
Recreational maths with 81497728
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The information we have on file for 81497728 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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