28665728
28,665,728 is an even composite number composed of five prime numbers multiplied together.
28665728 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred twenty-eight divisors.
Prime factorization of 28665728:
27 × 7 × 13 × 23 × 107
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 7 × 13 × 23 × 107)See below for interesting mathematical facts about the number 28665728 from the Numbermatics database.
Names of 28665728
- Cardinal: 28665728 can be written as Twenty-eight million, six hundred sixty-five thousand, seven hundred twenty-eight.
Scientific notation
- Scientific notation: 2.8665728 × 107
Factors of 28665728
Divisors of 28665728
- Number of divisors d(n): 128
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Complete list of divisors:
1 2 4 7 8 13 14 16 23 26 28 32 46 52 56 64 91 92 104 107 112 128 161 182 184 208 214 224 299 322 364 368 416 428 448 598 644 728 736 749 832 856 896 1196 1288 1391 1456 1472 1498 1664 1712 2093 2392 2461 2576 2782 2912 2944 2996 3424 4186 4784 4922 5152 5564 5824 5992 6848 8372 9568 9737 9844 10304 11128 11648 11984 13696 16744 17227 19136 19474 19688 20608 22256 23968 31993 33488 34454 38272 38948 39376 44512 47936 63986 66976 68908 77896 78752 89024 95872 127972 133952 137816 155792 157504 178048 223951 255944 267904 275632 311584 315008 447902 511888 551264 623168 895804 1023776 1102528 1246336 1791608 2047552 2205056 3583216 4095104 7166432 14332864 28665728
- Sum of all divisors σ(n): 74027520
- Sum of proper divisors (its aliquot sum) s(n): 45361792
- 28665728 is an abundant number, because the sum of its proper divisors (45361792) is greater than itself. Its abundance is 16696064
Bases of 28665728
- Binary: 11011010101100111100000002
- Hexadecimal: 0x1B56780
- Base-36: H2EM8
Squares and roots of 28665728
- 28665728 squared (286657282) is 821723961769984
- 28665728 cubed (286657283) is 23555315579180759908352
-
The
square root of 28665728 is 5354.0384757677 -
The
cube root of 28665728 is 306.0466700855
Scales and comparisons
How big is 28665728?- 28,665,728 seconds is equal to 47 weeks, 2 days, 18 hours, 42 minutes, 8 seconds.
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To count from 1 to 28,665,728 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 28665728 cubic inches would be around 25.5 feet tall.
Recreational maths with 28665728
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The information we have on file for 28665728 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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