28971390
28,971,390 is an even composite number composed of seven prime numbers multiplied together.
28971390 is an even composite number. It is composed of seven distinct prime numbers multiplied together. It has a total of one hundred twenty-eight divisors.
Prime factorization of 28971390:
2 × 3 × 5 × 7 × 19 × 53 × 137
See below for interesting mathematical facts about the number 28971390 from the Numbermatics database.
Names of 28971390
- Cardinal: 28971390 can be written as Twenty-eight million, nine hundred seventy-one thousand, three hundred ninety.
Scientific notation
- Scientific notation: 2.897139 × 107
Factors of 28971390
Divisors of 28971390
- Number of divisors d(n): 128
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Complete list of divisors:
1 2 3 5 6 7 10 14 15 19 21 30 35 38 42 53 57 70 95 105 106 114 133 137 159 190 210 265 266 274 285 318 371 399 411 530 570 665 685 742 795 798 822 959 1007 1113 1330 1370 1590 1855 1918 1995 2014 2055 2226 2603 2877 3021 3710 3990 4110 4795 5035 5206 5565 5754 6042 7049 7261 7809 9590 10070 11130 13015 14098 14385 14522 15105 15618 18221 21147 21783 26030 28770 30210 35245 36305 36442 39045 42294 43566 50827 54663 70490 72610 78090 91105 101654 105735 108915 109326 137959 152481 182210 211470 217830 254135 273315 275918 304962 413877 508270 546630 689795 762405 827754 965713 1379590 1524810 1931426 2069385 2897139 4138770 4828565 5794278 9657130 14485695 28971390
- Sum of all divisors σ(n): 85847040
- Sum of proper divisors (its aliquot sum) s(n): 56875650
- 28971390 is an abundant number, because the sum of its proper divisors (56875650) is greater than itself. Its abundance is 27904260
Bases of 28971390
- Binary: 11011101000010001011111102
- Hexadecimal: 0x1BA117E
- Base-36: H8YGU
Squares and roots of 28971390
- 28971390 squared (289713902) is 839341438532100
- 28971390 cubed (289713903) is 24316888158874496619000
-
The
square root of 28971390 is 5382.5077798367 -
The
cube root of 28971390 is 307.1306160101
Scales and comparisons
How big is 28971390?- 28,971,390 seconds is equal to 47 weeks, 6 days, 7 hours, 36 minutes, 30 seconds.
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To count from 1 to 28,971,390 would take you about nineteen weeks!
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 28971390 cubic inches would be around 25.6 feet tall.
Recreational maths with 28971390
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The information we have on file for 28971390 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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