28991025
28,991,025 is an odd composite number composed of five prime numbers multiplied together.
28991025 is an odd composite number. It is composed of five distinct prime numbers multiplied together. It has a total of seventy-two divisors.
Prime factorization of 28991025:
32 × 52 × 7 × 79 × 233
(3 × 3 × 5 × 5 × 7 × 79 × 233)See below for interesting mathematical facts about the number 28991025 from the Numbermatics database.
Names of 28991025
- Cardinal: 28991025 can be written as Twenty-eight million, nine hundred ninety-one thousand and twenty-five.
Scientific notation
- Scientific notation: 2.8991025 × 107
Factors of 28991025
Divisors of 28991025
- Number of divisors d(n): 72
-
Complete list of divisors:
1 3 5 7 9 15 21 25 35 45 63 75 79 105 175 225 233 237 315 395 525 553 699 711 1165 1185 1575 1631 1659 1975 2097 2765 3495 3555 4893 4977 5825 5925 8155 8295 10485 13825 14679 17475 17775 18407 24465 24885 40775 41475 52425 55221 73395 92035 122325 124425 128849 165663 276105 366975 386547 460175 644245 828315 1159641 1380525 1932735 3221225 4141575 5798205 9663675 28991025
- Sum of all divisors σ(n): 60353280
- Sum of proper divisors (its aliquot sum) s(n): 31362255
- 28991025 is an abundant number, because the sum of its proper divisors (31362255) is greater than itself. Its abundance is 2371230
Bases of 28991025
- Binary: 11011101001011110001100012
- Hexadecimal: 0x1BA5E31
- Base-36: H9DM9
Squares and roots of 28991025
- 28991025 squared (289910252) is 840479530550625
- 28991025 cubed (289910253) is 24366363082181433140625
-
The
square root of 28991025 is 5384.3314348209 -
The
cube root of 28991025 is 307.1999849955
Scales and comparisons
How big is 28991025?- 28,991,025 seconds is equal to 47 weeks, 6 days, 13 hours, 3 minutes, 45 seconds.
-
To count from 1 to 28,991,025 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 28991025 cubic inches would be around 25.6 feet tall.
Recreational maths with 28991025
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The information we have on file for 28991025 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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