28720
28,720 is an even composite number composed of three prime numbers multiplied together.
28720 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twenty divisors.
Prime factorization of 28720:
24 × 5 × 359
(2 × 2 × 2 × 2 × 5 × 359)See below for interesting mathematical facts about the number 28720 from the Numbermatics database.
Names of 28720
- Cardinal: 28720 can be written as Twenty-eight thousand, seven hundred twenty.
Scientific notation
- Scientific notation: 2.872 × 104
Factors of 28720
Divisors of 28720
Bases of 28720
- Binary: 1110000001100002
- Hexadecimal: 0x7030
- Base-36: M5S
Squares and roots of 28720
- 28720 squared (287202) is 824838400
- 28720 cubed (287203) is 23689358848000
-
The
square root of 28720 is 169.4697613145 -
The
cube root of 28720 is 30.6239691449
Scales and comparisons
How big is 28720?- 28,720 seconds is equal to 7 hours, 58 minutes, 40 seconds.
-
To count from 1 to 28,720 would take you about seven hours.
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 28720 cubic inches would be around 2.6 feet tall.
Recreational maths with 28720
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