1805
1,805 is an odd composite number composed of two prime numbers multiplied together.
1805 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of six divisors.
Prime factorization of 1805:
5^{} × 19^{2}
(5 × 19 × 19)See below for interesting mathematical facts about the number 1805 from the Numbermatics database.
Names of 1805
 Cardinal: 1805 can be written as One thousand, eight hundred five.
Scientific notation
 Scientific notation: 1.805 × 10^{3}
Factors of 1805
Divisors of 1805
Bases of 1805
 Binary: 11100001101_{2}
 Hexadecimal: 0x70D
 Base36: 1E5
Squares and roots of 1805
 1805 squared (1805^{2}) is 3258025
 1805 cubed (1805^{3}) is 5880735125

The
square root of 1805 is 42.4852915725 
The
cube root of 1805 is 12.1756569153
Scales and comparisons
How big is 1805? 1,805 seconds is equal to 30 minutes, 5 seconds.

To count from 1 to 1,805 would take you about thirty 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 1805 cubic inches would be around 1 feet tall.
Recreational maths with 1805
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The information we have on file for 1805 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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