81680040
81,680,040 is an even composite number composed of six prime numbers multiplied together.
81680040 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of one hundred ninety-two divisors.
Prime factorization of 81680040:
23 × 32 × 5 × 13 × 31 × 563
(2 × 2 × 2 × 3 × 3 × 5 × 13 × 31 × 563)See below for interesting mathematical facts about the number 81680040 from the Numbermatics database.
Names of 81680040
- Cardinal: 81680040 can be written as Eighty-one million, six hundred eighty thousand and forty.
Scientific notation
- Scientific notation: 8.168004 × 107
Factors of 81680040
Divisors of 81680040
- Number of divisors d(n): 192
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Complete list of divisors:
1 2 3 4 5 6 8 9 10 12 13 15 18 20 24 26 30 31 36 39 40 45 52 60 62 65 72 78 90 93 104 117 120 124 130 155 156 180 186 195 234 248 260 279 310 312 360 372 390 403 465 468 520 558 563 585 620 744 780 806 930 936 1116 1126 1170 1209 1240 1395 1560 1612 1689 1860 2015 2232 2252 2340 2418 2790 2815 3224 3378 3627 3720 4030 4504 4680 4836 5067 5580 5630 6045 6756 7254 7319 8060 8445 9672 10134 11160 11260 12090 13512 14508 14638 16120 16890 17453 18135 20268 21957 22520 24180 25335 29016 29276 33780 34906 36270 36595 40536 43914 48360 50670 52359 58552 65871 67560 69812 72540 73190 87265 87828 101340 104718 109785 131742 139624 145080 146380 157077 174530 175656 202680 209436 219570 226889 261795 263484 292760 314154 329355 349060 418872 439140 453778 523590 526968 628308 658710 680667 698120 785385 878280 907556 1047180 1134445 1256616 1317420 1361334 1570770 1815112 2042001 2094360 2268890 2634840 2722668 3141540 3403335 4084002 4537780 5445336 6283080 6806670 8168004 9075560 10210005 13613340 16336008 20420010 27226680 40840020 81680040
- Sum of all divisors σ(n): 295626240
- Sum of proper divisors (its aliquot sum) s(n): 213946200
- 81680040 is an abundant number, because the sum of its proper divisors (213946200) is greater than itself. Its abundance is 132266160
Bases of 81680040
- Binary: 1001101111001010110101010002
- Hexadecimal: 0x4DE56A8
- Base-36: 1CMOQ0
Squares and roots of 81680040
- 81680040 squared (816800402) is 6671628934401600
- 81680040 cubed (816800403) is 544938918227080064064000
-
The
square root of 81680040 is 9037.7010351085 -
The
cube root of 81680040 is 433.8823468663
Scales and comparisons
How big is 81680040?- 81,680,040 seconds is equal to 2 years, 31 weeks, 8 hours, 54 minutes.
-
To count from 1 to 81,680,040 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 81680040 cubic inches would be around 36.2 feet tall.
Recreational maths with 81680040
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The information we have on file for 81680040 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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