28987440
28,987,440 is an even composite number composed of five prime numbers multiplied together.
28987440 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of eighty divisors.
Prime factorization of 28987440:
24 × 3 × 5 × 269 × 449
(2 × 2 × 2 × 2 × 3 × 5 × 269 × 449)See below for interesting mathematical facts about the number 28987440 from the Numbermatics database.
Names of 28987440
- Cardinal: 28987440 can be written as Twenty-eight million, nine hundred eighty-seven thousand, four hundred forty.
Scientific notation
- Scientific notation: 2.898744 × 107
Factors of 28987440
Divisors of 28987440
- Number of divisors d(n): 80
-
Complete list of divisors:
1 2 3 4 5 6 8 10 12 15 16 20 24 30 40 48 60 80 120 240 269 449 538 807 898 1076 1345 1347 1614 1796 2152 2245 2690 2694 3228 3592 4035 4304 4490 5380 5388 6456 6735 7184 8070 8980 10760 10776 12912 13470 16140 17960 21520 21552 26940 32280 35920 53880 64560 107760 120781 241562 362343 483124 603905 724686 966248 1207810 1449372 1811715 1932496 2415620 2898744 3623430 4831240 5797488 7246860 9662480 14493720 28987440
- Sum of all divisors σ(n): 90396000
- Sum of proper divisors (its aliquot sum) s(n): 61408560
- 28987440 is an abundant number, because the sum of its proper divisors (61408560) is greater than itself. Its abundance is 32421120
Bases of 28987440
- Binary: 11011101001010000001100002
- Hexadecimal: 0x1BA5030
- Base-36: H9AUO
Squares and roots of 28987440
- 28987440 squared (289874402) is 840271677753600
- 28987440 cubed (289874403) is 24357324842581814784000
-
The
square root of 28987440 is 5383.9985141153 -
The
cube root of 28987440 is 307.1873217967
Scales and comparisons
How big is 28987440?- 28,987,440 seconds is equal to 47 weeks, 6 days, 12 hours, 4 minutes.
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To count from 1 to 28,987,440 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 28987440 cubic inches would be around 25.6 feet tall.
Recreational maths with 28987440
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The information we have on file for 28987440 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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