81042390
81,042,390 is an even composite number composed of six prime numbers multiplied together.
81042390 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 81042390:
2 × 33 × 5 × 11 × 13 × 2099
(2 × 3 × 3 × 3 × 5 × 11 × 13 × 2099)See below for interesting mathematical facts about the number 81042390 from the Numbermatics database.
Names of 81042390
- Cardinal: 81042390 can be written as Eighty-one million, forty-two thousand, three hundred ninety.
Scientific notation
- Scientific notation: 8.104239 × 107
Factors of 81042390
Divisors of 81042390
- Number of divisors d(n): 128
-
Complete list of divisors:
1 2 3 5 6 9 10 11 13 15 18 22 26 27 30 33 39 45 54 55 65 66 78 90 99 110 117 130 135 143 165 195 198 234 270 286 297 330 351 390 429 495 585 594 702 715 858 990 1170 1287 1430 1485 1755 2099 2145 2574 2970 3510 3861 4198 4290 6297 6435 7722 10495 12594 12870 18891 19305 20990 23089 27287 31485 37782 38610 46178 54574 56673 62970 69267 81861 94455 113346 115445 136435 138534 163722 188910 207801 230890 245583 272870 283365 300157 346335 409305 415602 491166 566730 600314 623403 692670 736749 818610 900471 1039005 1227915 1246806 1473498 1500785 1800942 2078010 2455830 2701413 3001570 3117015 3683745 4502355 5402826 6234030 7367490 8104239 9004710 13507065 16208478 27014130 40521195 81042390
- Sum of all divisors σ(n): 254016000
- Sum of proper divisors (its aliquot sum) s(n): 172973610
- 81042390 is an abundant number, because the sum of its proper divisors (172973610) is greater than itself. Its abundance is 91931220
Bases of 81042390
- Binary: 1001101010010011011110101102
- Hexadecimal: 0x4D49BD6
- Base-36: 1C90PI
Squares and roots of 81042390
- 81042390 squared (810423902) is 6567868976912100
- 81042390 cubed (810423903) is 532275799095811403919000
-
The
square root of 81042390 is 9002.3546919681 -
The
cube root of 81042390 is 432.7503356569
Scales and comparisons
How big is 81042390?- 81,042,390 seconds is equal to 2 years, 29 weeks, 6 days, 23 hours, 46 minutes, 30 seconds.
-
To count from 1 to 81,042,390 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 81042390 cubic inches would be around 36.1 feet tall.
Recreational maths with 81042390
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The information we have on file for 81042390 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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