81321984
81,321,984 is an even composite number composed of three prime numbers multiplied together.
81321984 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of eighty-four divisors.
Prime factorization of 81321984:
213 × 32 × 1103
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 3 × 1103)See below for interesting mathematical facts about the number 81321984 from the Numbermatics database.
Names of 81321984
- Cardinal: 81321984 can be written as Eighty-one million, three hundred twenty-one thousand, nine hundred eighty-four.
Scientific notation
- Scientific notation: 8.1321984 × 107
Factors of 81321984
Divisors of 81321984
- Number of divisors d(n): 84
-
Complete list of divisors:
1 2 3 4 6 8 9 12 16 18 24 32 36 48 64 72 96 128 144 192 256 288 384 512 576 768 1024 1103 1152 1536 2048 2206 2304 3072 3309 4096 4412 4608 6144 6618 8192 8824 9216 9927 12288 13236 17648 18432 19854 24576 26472 35296 36864 39708 52944 70592 73728 79416 105888 141184 158832 211776 282368 317664 423552 564736 635328 847104 1129472 1270656 1694208 2258944 2541312 3388416 4517888 5082624 6776832 9035776 10165248 13553664 20330496 27107328 40660992 81321984
- Sum of all divisors σ(n): 235128816
- Sum of proper divisors (its aliquot sum) s(n): 153806832
- 81321984 is an abundant number, because the sum of its proper divisors (153806832) is greater than itself. Its abundance is 72484848
Bases of 81321984
- Binary: 1001101100011100000000000002
- Hexadecimal: 0x4D8E000
- Base-36: 1CF0G0
Squares and roots of 81321984
- 81321984 squared (813219842) is 6613265081696256
- 81321984 cubed (813219843) is 537803837161461623291904
-
The
square root of 81321984 is 9017.8702585479 -
The
cube root of 81321984 is 433.2474233373
Scales and comparisons
How big is 81321984?- 81,321,984 seconds is equal to 2 years, 30 weeks, 3 days, 5 hours, 26 minutes, 24 seconds.
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To count from 1 to 81,321,984 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 81321984 cubic inches would be around 36.1 feet tall.
Recreational maths with 81321984
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The information we have on file for 81321984 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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