128729988
128,729,988 is an even composite number composed of five prime numbers multiplied together.
128729988 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of seventy-two divisors.
Prime factorization of 128729988:
22 × 32 × 23 × 107 × 1453
(2 × 2 × 3 × 3 × 23 × 107 × 1453)See below for interesting mathematical facts about the number 128729988 from the Numbermatics database.
Names of 128729988
- Cardinal: 128729988 can be written as One hundred twenty-eight million, seven hundred twenty-nine thousand, nine hundred eighty-eight.
Scientific notation
- Scientific notation: 1.28729988 × 108
Factors of 128729988
Divisors of 128729988
- Number of divisors d(n): 72
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Complete list of divisors:
1 2 3 4 6 9 12 18 23 36 46 69 92 107 138 207 214 276 321 414 428 642 828 963 1284 1453 1926 2461 2906 3852 4359 4922 5812 7383 8718 9844 13077 14766 17436 22149 26154 29532 33419 44298 52308 66838 88596 100257 133676 155471 200514 300771 310942 401028 466413 601542 621884 932826 1203084 1399239 1865652 2798478 3575833 5596956 7151666 10727499 14303332 21454998 32182497 42909996 64364994 128729988
- Sum of all divisors σ(n): 342957888
- Sum of proper divisors (its aliquot sum) s(n): 214227900
- 128729988 is an abundant number, because the sum of its proper divisors (214227900) is greater than itself. Its abundance is 85497912
Bases of 128729988
- Binary: 1111010110001000011100001002
- Hexadecimal: 0x7AC4384
- Base-36: 24N4P0
Squares and roots of 128729988
- 128729988 squared (1287299882) is 16571409810480144
- 128729988 cubed (1287299883) is 2133237386046191211358272
-
The
square root of 128729988 is 11345.9238495593 -
The
cube root of 128729988 is 504.9246536609
Scales and comparisons
How big is 128729988?- 128,729,988 seconds is equal to 4 years, 4 weeks, 5 days, 22 hours, 19 minutes, 48 seconds.
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To count from 1 to 128,729,988 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 128729988 cubic inches would be around 42.1 feet tall.
Recreational maths with 128729988
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The information we have on file for 128729988 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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