81359960
81,359,960 is an even composite number composed of six prime numbers multiplied together.
81359960 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of one hundred twenty-eight divisors.
Prime factorization of 81359960:
23 × 5 × 11 × 17 × 73 × 149
(2 × 2 × 2 × 5 × 11 × 17 × 73 × 149)See below for interesting mathematical facts about the number 81359960 from the Numbermatics database.
Names of 81359960
- Cardinal: 81359960 can be written as Eighty-one million, three hundred fifty-nine thousand, nine hundred sixty.
Scientific notation
- Scientific notation: 8.135996 × 107
Factors of 81359960
Divisors of 81359960
- Number of divisors d(n): 128
-
Complete list of divisors:
1 2 4 5 8 10 11 17 20 22 34 40 44 55 68 73 85 88 110 136 146 149 170 187 220 292 298 340 365 374 440 584 596 680 730 745 748 803 935 1192 1241 1460 1490 1496 1606 1639 1870 2482 2533 2920 2980 3212 3278 3740 4015 4964 5066 5960 6205 6424 6556 7480 8030 8195 9928 10132 10877 12410 12665 13112 13651 16060 16390 20264 21754 24820 25330 27302 27863 32120 32780 43508 49640 50660 54385 54604 55726 65560 68255 87016 101320 108770 109208 111452 119647 136510 139315 184909 217540 222904 239294 273020 278630 369818 435080 478588 546040 557260 598235 739636 924545 957176 1114520 1196470 1479272 1849090 2033999 2392940 3698180 4067998 4785880 7396360 8135996 10169995 16271992 20339990 40679980 81359960
- Sum of all divisors σ(n): 215784000
- Sum of proper divisors (its aliquot sum) s(n): 134424040
- 81359960 is an abundant number, because the sum of its proper divisors (134424040) is greater than itself. Its abundance is 53064080
Bases of 81359960
- Binary: 1001101100101110100010110002
- Hexadecimal: 0x4D97458
- Base-36: 1CFTQW
Squares and roots of 81359960
- 81359960 squared (813599602) is 6619443091201600
- 81359960 cubed (813599603) is 538557625122438527936000
-
The
square root of 81359960 is 9019.9756097231 -
The
cube root of 81359960 is 433.3148525977
Scales and comparisons
How big is 81359960?- 81,359,960 seconds is equal to 2 years, 30 weeks, 3 days, 15 hours, 59 minutes, 20 seconds.
-
To count from 1 to 81,359,960 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 81359960 cubic inches would be around 36.1 feet tall.
Recreational maths with 81359960
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