28878640
28,878,640 is an even composite number composed of five prime numbers multiplied together.
28878640 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred twenty divisors.
Prime factorization of 28878640:
24 × 5 × 72 × 53 × 139
(2 × 2 × 2 × 2 × 5 × 7 × 7 × 53 × 139)See below for interesting mathematical facts about the number 28878640 from the Numbermatics database.
Names of 28878640
- Cardinal: 28878640 can be written as Twenty-eight million, eight hundred seventy-eight thousand, six hundred forty.
Scientific notation
- Scientific notation: 2.887864 × 107
Factors of 28878640
Divisors of 28878640
- Number of divisors d(n): 120
-
Complete list of divisors:
1 2 4 5 7 8 10 14 16 20 28 35 40 49 53 56 70 80 98 106 112 139 140 196 212 245 265 278 280 371 392 424 490 530 556 560 695 742 784 848 973 980 1060 1112 1390 1484 1855 1946 1960 2120 2224 2597 2780 2968 3710 3892 3920 4240 4865 5194 5560 5936 6811 7367 7420 7784 9730 10388 11120 12985 13622 14734 14840 15568 19460 20776 25970 27244 29468 29680 34055 36835 38920 41552 51569 51940 54488 58936 68110 73670 77840 103138 103880 108976 117872 136220 147340 206276 207760 257845 272440 294680 360983 412552 515690 544880 589360 721966 825104 1031380 1443932 1804915 2062760 2887864 3609830 4125520 5775728 7219660 14439320 28878640
- Sum of all divisors σ(n): 80151120
- Sum of proper divisors (its aliquot sum) s(n): 51272480
- 28878640 is an abundant number, because the sum of its proper divisors (51272480) is greater than itself. Its abundance is 22393840
Bases of 28878640
- Binary: 11011100010100111001100002
- Hexadecimal: 0x1B8A730
- Base-36: H6YWG
Squares and roots of 28878640
- 28878640 squared (288786402) is 833975848249600
- 28878640 cubed (288786403) is 24084088290294828544000
-
The
square root of 28878640 is 5373.8850006303 -
The
cube root of 28878640 is 306.8025128033
Scales and comparisons
How big is 28878640?- 28,878,640 seconds is equal to 47 weeks, 5 days, 5 hours, 50 minutes, 40 seconds.
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To count from 1 to 28,878,640 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 28878640 cubic inches would be around 25.6 feet tall.
Recreational maths with 28878640
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The information we have on file for 28878640 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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