3920
3,920 is an even composite number composed of three prime numbers multiplied together.
3920 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of thirty divisors.
Prime factorization of 3920:
2^{4} × 5^{} × 7^{2}
(2 × 2 × 2 × 2 × 5 × 7 × 7)See below for interesting mathematical facts about the number 3920 from the Numbermatics database.
Names of 3920
 Cardinal: 3920 can be written as Three thousand, nine hundred twenty.
Scientific notation
 Scientific notation: 3.92 × 10^{3}
Factors of 3920
Divisors of 3920
Bases of 3920
 Binary: 111101010000_{2}
 Hexadecimal: 0xF50
 Base36: 30W
Squares and roots of 3920
 3920 squared (3920^{2}) is 15366400
 3920 cubed (3920^{3}) is 60236288000

The
square root of 3920 is 62.6099033699 
The
cube root of 3920 is 15.7674703263
Scales and comparisons
How big is 3920? 3,920 seconds is equal to 1 hour, 5 minutes, 20 seconds.

To count from 1 to 3,920 would take you about five 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 3920 cubic inches would be around 1.3 feet tall.
Recreational maths with 3920
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