81088640
81,088,640 is an even composite number composed of five prime numbers multiplied together.
81088640 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 81088640:
27 × 5 × 17 × 29 × 257
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 5 × 17 × 29 × 257)See below for interesting mathematical facts about the number 81088640 from the Numbermatics database.
Names of 81088640
- Cardinal: 81088640 can be written as Eighty-one million, eighty-eight thousand, six hundred forty.
Scientific notation
- Scientific notation: 8.108864 × 107
Factors of 81088640
Divisors of 81088640
- Number of divisors d(n): 128
-
Complete list of divisors:
1 2 4 5 8 10 16 17 20 29 32 34 40 58 64 68 80 85 116 128 136 145 160 170 232 257 272 290 320 340 464 493 514 544 580 640 680 928 986 1028 1088 1160 1285 1360 1856 1972 2056 2176 2320 2465 2570 2720 3712 3944 4112 4369 4640 4930 5140 5440 7453 7888 8224 8738 9280 9860 10280 10880 14906 15776 16448 17476 18560 19720 20560 21845 29812 31552 32896 34952 37265 39440 41120 43690 59624 63104 69904 74530 78880 82240 87380 119248 126701 139808 149060 157760 164480 174760 238496 253402 279616 298120 315520 349520 476992 506804 559232 596240 633505 699040 953984 1013608 1192480 1267010 1398080 2027216 2384960 2534020 2796160 4054432 4769920 5068040 8108864 10136080 16217728 20272160 40544320 81088640
- Sum of all divisors σ(n): 213159600
- Sum of proper divisors (its aliquot sum) s(n): 132070960
- 81088640 is an abundant number, because the sum of its proper divisors (132070960) is greater than itself. Its abundance is 50982320
Bases of 81088640
- Binary: 1001101010101010000100000002
- Hexadecimal: 0x4D55080
- Base-36: 1CA0E8
Squares and roots of 81088640
- 81088640 squared (810886402) is 6575367537049600
- 81088640 cubed (810886403) is 533187611079501676544000
-
The
square root of 81088640 is 9004.9230979503 -
The
cube root of 81088640 is 432.8326419529
Scales and comparisons
How big is 81088640?- 81,088,640 seconds is equal to 2 years, 30 weeks, 12 hours, 37 minutes, 20 seconds.
-
To count from 1 to 81,088,640 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 81088640 cubic inches would be around 36.1 feet tall.
Recreational maths with 81088640
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