81004240
81,004,240 is an even composite number composed of five prime numbers multiplied together.
81004240 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of eighty divisors.
Prime factorization of 81004240:
24 × 5 × 31 × 89 × 367
(2 × 2 × 2 × 2 × 5 × 31 × 89 × 367)See below for interesting mathematical facts about the number 81004240 from the Numbermatics database.
Names of 81004240
- Cardinal: 81004240 can be written as Eighty-one million, four thousand, two hundred forty.
Scientific notation
- Scientific notation: 8.100424 × 107
Factors of 81004240
Divisors of 81004240
- Number of divisors d(n): 80
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Complete list of divisors:
1 2 4 5 8 10 16 20 31 40 62 80 89 124 155 178 248 310 356 367 445 496 620 712 734 890 1240 1424 1468 1780 1835 2480 2759 2936 3560 3670 5518 5872 7120 7340 11036 11377 13795 14680 22072 22754 27590 29360 32663 44144 45508 55180 56885 65326 91016 110360 113770 130652 163315 182032 220720 227540 261304 326630 455080 522608 653260 910160 1012553 1306520 2025106 2613040 4050212 5062765 8100424 10125530 16200848 20251060 40502120 81004240
- Sum of all divisors σ(n): 197130240
- Sum of proper divisors (its aliquot sum) s(n): 116126000
- 81004240 is an abundant number, because the sum of its proper divisors (116126000) is greater than itself. Its abundance is 35121760
Bases of 81004240
- Binary: 1001101010000000110110100002
- Hexadecimal: 0x4D406D0
- Base-36: 1C879S
Squares and roots of 81004240
- 81004240 squared (810042402) is 6561686897977600
- 81004240 cubed (810042403) is 531524460288633025024000
-
The
square root of 81004240 is 9000.2355524731 -
The
cube root of 81004240 is 432.6824205139
Scales and comparisons
How big is 81004240?- 81,004,240 seconds is equal to 2 years, 29 weeks, 6 days, 13 hours, 10 minutes, 40 seconds.
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To count from 1 to 81,004,240 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 81004240 cubic inches would be around 36.1 feet tall.
Recreational maths with 81004240
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The information we have on file for 81004240 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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