138138728
138,138,728 is an even composite number composed of five prime numbers multiplied together.
138138728 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of sixty-four divisors.
Prime factorization of 138138728:
23 × 7 × 13 × 31 × 6121
(2 × 2 × 2 × 7 × 13 × 31 × 6121)See below for interesting mathematical facts about the number 138138728 from the Numbermatics database.
Names of 138138728
- Cardinal: 138138728 can be written as One hundred thirty-eight million, one hundred thirty-eight thousand, seven hundred twenty-eight.
Scientific notation
- Scientific notation: 1.38138728 × 108
Factors of 138138728
Divisors of 138138728
- Number of divisors d(n): 64
-
Complete list of divisors:
1 2 4 7 8 13 14 26 28 31 52 56 62 91 104 124 182 217 248 364 403 434 728 806 868 1612 1736 2821 3224 5642 6121 11284 12242 22568 24484 42847 48968 79573 85694 159146 171388 189751 318292 342776 379502 557011 636584 759004 1114022 1328257 1518008 2228044 2466763 2656514 4456088 4933526 5313028 9867052 10626056 17267341 19734104 34534682 69069364 138138728
- Sum of all divisors σ(n): 329118720
- Sum of proper divisors (its aliquot sum) s(n): 190979992
- 138138728 is an abundant number, because the sum of its proper divisors (190979992) is greater than itself. Its abundance is 52841264
Bases of 138138728
- Binary: 10000011101111010100011010002
- Hexadecimal: 0x83BD468
- Base-36: 2A8SIW
Squares and roots of 138138728
- 138138728 squared (1381387282) is 19082308173457984
- 138138728 cubed (1381387283) is 2636005778385489271204352
-
The
square root of 138138728 is 11753.2432970649 -
The
cube root of 138138728 is 516.9380309255
Scales and comparisons
How big is 138138728?- 138,138,728 seconds is equal to 4 years, 20 weeks, 2 days, 19 hours, 52 minutes, 8 seconds.
-
To count from 1 to 138,138,728 would take you about six 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 138138728 cubic inches would be around 43.1 feet tall.
Recreational maths with 138138728
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The information we have on file for 138138728 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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