28420
28,420 is an even composite number composed of four prime numbers multiplied together.
28420 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of thirtysix divisors.
Prime factorization of 28420:
2^{2} × 5^{} × 7^{2} × 29^{}
(2 × 2 × 5 × 7 × 7 × 29)See below for interesting mathematical facts about the number 28420 from the Numbermatics database.
Names of 28420
 Cardinal: 28420 can be written as Twentyeight thousand, four hundred twenty.
Scientific notation
 Scientific notation: 2.842 × 10^{4}
Factors of 28420
Divisors of 28420
Bases of 28420
 Binary: 110111100000100_{2}
 Hexadecimal: 0x6F04
 Base36: LXG
Squares and roots of 28420
 28420 squared (28420^{2}) is 807696400
 28420 cubed (28420^{3}) is 22954731688000

The
square root of 28420 is 168.5823241031 
The
cube root of 28420 is 30.5169662837
Scales and comparisons
How big is 28420? 28,420 seconds is equal to 7 hours, 53 minutes, 40 seconds.

To count from 1 to 28,420 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 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 28420 cubic inches would be around 2.5 feet tall.
Recreational maths with 28420
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