285
285 is an odd composite number composed of three prime numbers multiplied together.
285 is an odd composite number. It is composed of three distinct prime numbers multiplied together. It has a total of eight divisors.
Prime factorization of 285:
3^{} × 5^{} × 19^{}
See below for interesting mathematical facts about the number 285 from the Numbermatics database.
Names of 285
 Cardinal: 285 can be written as Two hundred eightyfive.
Scientific notation
 Scientific notation: 2.85 × 10^{2}
Factors of 285
Divisors of 285
Bases of 285
 Binary: 100011101_{2}
 Hexadecimal: 0x11D
 Base36: 7X
Squares and roots of 285
Scales and comparisons
How big is 285? 285 seconds is equal to 4 minutes, 45 seconds.

To count from 1 to 285 would take you about two minutes.
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 randomlychosen 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 285 cubic inches would be around 0.5 feet tall.
Recreational maths with 285
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The information we have on file for 285 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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