28991000
28,991,000 is an even composite number composed of four prime numbers multiplied together.
28991000 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of sixty-four divisors.
Prime factorization of 28991000:
23 × 53 × 53 × 547
(2 × 2 × 2 × 5 × 5 × 5 × 53 × 547)See below for interesting mathematical facts about the number 28991000 from the Numbermatics database.
Names of 28991000
- Cardinal: 28991000 can be written as Twenty-eight million, nine hundred ninety-one thousand.
Scientific notation
- Scientific notation: 2.8991 × 107
Factors of 28991000
Divisors of 28991000
- Number of divisors d(n): 64
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Complete list of divisors:
1 2 4 5 8 10 20 25 40 50 53 100 106 125 200 212 250 265 424 500 530 547 1000 1060 1094 1325 2120 2188 2650 2735 4376 5300 5470 6625 10600 10940 13250 13675 21880 26500 27350 28991 53000 54700 57982 68375 109400 115964 136750 144955 231928 273500 289910 547000 579820 724775 1159640 1449550 2899100 3623875 5798200 7247750 14495500 28991000
- Sum of all divisors σ(n): 69245280
- Sum of proper divisors (its aliquot sum) s(n): 40254280
- 28991000 is an abundant number, because the sum of its proper divisors (40254280) is greater than itself. Its abundance is 11263280
Bases of 28991000
- Binary: 11011101001011110000110002
- Hexadecimal: 0x1BA5E18
- Base-36: H9DLK
Squares and roots of 28991000
- 28991000 squared (289910002) is 840478081000000
- 28991000 cubed (289910003) is 24366300046271000000000
-
The
square root of 28991000 is 5384.3291132693 -
The
cube root of 28991000 is 307.1998966923
Scales and comparisons
How big is 28991000?- 28,991,000 seconds is equal to 47 weeks, 6 days, 13 hours, 3 minutes, 20 seconds.
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To count from 1 to 28,991,000 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 28991000 cubic inches would be around 25.6 feet tall.
Recreational maths with 28991000
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The information we have on file for 28991000 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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