72145728
72,145,728 is an even composite number composed of three prime numbers multiplied together.
72145728 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 72145728:
26 × 35 × 4639
(2 × 2 × 2 × 2 × 2 × 2 × 3 × 3 × 3 × 3 × 3 × 4639)See below for interesting mathematical facts about the number 72145728 from the Numbermatics database.
Names of 72145728
- Cardinal: 72145728 can be written as Seventy-two million, one hundred forty-five thousand, seven hundred twenty-eight.
Scientific notation
- Scientific notation: 7.2145728 × 107
Factors of 72145728
Divisors of 72145728
- Number of divisors d(n): 84
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Complete list of divisors:
1 2 3 4 6 8 9 12 16 18 24 27 32 36 48 54 64 72 81 96 108 144 162 192 216 243 288 324 432 486 576 648 864 972 1296 1728 1944 2592 3888 4639 5184 7776 9278 13917 15552 18556 27834 37112 41751 55668 74224 83502 111336 125253 148448 167004 222672 250506 296896 334008 375759 445344 501012 668016 751518 890688 1002024 1127277 1336032 1503036 2004048 2254554 2672064 3006072 4008096 4509108 6012144 8016192 9018216 12024288 18036432 24048576 36072864 72145728
- Sum of all divisors σ(n): 214497920
- Sum of proper divisors (its aliquot sum) s(n): 142352192
- 72145728 is an abundant number, because the sum of its proper divisors (142352192) is greater than itself. Its abundance is 70206464
Bases of 72145728
- Binary: 1000100110011011011010000002
- Hexadecimal: 0x44CDB40
- Base-36: 16YC00
Squares and roots of 72145728
- 72145728 squared (721457282) is 5205006068649984
- 72145728 cubed (721457283) is 375518952067171072868352
-
The
square root of 72145728 is 8493.8641383059 -
The
cube root of 72145728 is 416.2972481063
Scales and comparisons
How big is 72145728?- 72,145,728 seconds is equal to 2 years, 15 weeks, 2 days, 28 minutes, 48 seconds.
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To count from 1 to 72,145,728 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 72145728 cubic inches would be around 34.7 feet tall.
Recreational maths with 72145728
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The information we have on file for 72145728 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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