81401985
81,401,985 is an odd composite number composed of six prime numbers multiplied together.
81401985 is an odd 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 81401985:
32 × 5 × 72 × 19 × 29 × 67
(3 × 3 × 5 × 7 × 7 × 19 × 29 × 67)See below for interesting mathematical facts about the number 81401985 from the Numbermatics database.
Names of 81401985
- Cardinal: 81401985 can be written as Eighty-one million, four hundred one thousand, nine hundred eighty-five.
Scientific notation
- Scientific notation: 8.1401985 × 107
Factors of 81401985
Divisors of 81401985
- Number of divisors d(n): 144
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Complete list of divisors:
1 3 5 7 9 15 19 21 29 35 45 49 57 63 67 87 95 105 133 145 147 171 201 203 245 261 285 315 335 399 435 441 469 551 603 609 665 735 855 931 1005 1015 1197 1273 1305 1407 1421 1653 1827 1943 1995 2205 2345 2755 2793 3015 3045 3283 3819 3857 4221 4263 4655 4959 5829 5985 6365 7035 7105 8265 8379 8911 9135 9715 9849 11457 11571 12789 13601 13965 16415 17487 19095 19285 21105 21315 24795 26733 26999 29145 29547 34713 36917 40803 41895 44555 49245 57285 57855 62377 63945 68005 80199 80997 87435 95207 110751 122409 133665 134995 147735 173565 184585 187131 204015 242991 258419 285621 311885 332253 400995 404985 476035 553755 561393 612045 775257 856863 935655 1214955 1292095 1428105 1661265 1808933 2325771 2806965 3876285 4284315 5426799 9044665 11628855 16280397 27133995 81401985
- Sum of all divisors σ(n): 181396800
- Sum of proper divisors (its aliquot sum) s(n): 99994815
- 81401985 is an abundant number, because the sum of its proper divisors (99994815) is greater than itself. Its abundance is 18592830
Bases of 81401985
- Binary: 1001101101000011000100000012
- Hexadecimal: 0x4DA1881
- Base-36: 1CGQ69
Squares and roots of 81401985
- 81401985 squared (814019852) is 6626283161940225
- 81401985 cubed (814019853) is 539392602554010766346625
-
The
square root of 81401985 is 9022.3048607327 -
The
cube root of 81401985 is 433.3894467111
Scales and comparisons
How big is 81401985?- 81,401,985 seconds is equal to 2 years, 30 weeks, 4 days, 3 hours, 39 minutes, 45 seconds.
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To count from 1 to 81,401,985 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 81401985 cubic inches would be around 36.1 feet tall.
Recreational maths with 81401985
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The information we have on file for 81401985 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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