28420

28,420 is an even composite number composed of four prime numbers multiplied together.

What does the number 28420 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 36 divisors.

28420 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of thirty-six divisors.

Prime factorization of 28420:

2² × 5 × 7² × 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 Twenty-eight thousand, four hundred twenty.

Scientific notation

Scientific notation: 2.842 × 10⁴

Factors of 28420

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 6
Sum of prime factors: 43

Divisors of 28420

Number of divisors d(n): 36
Complete list of divisors:
1 2 4 5 7 10 14 20 28 29 35 49 58 70 98 116 140 145 196 203 245 290 406 490 580 812 980 1015 1421 2030 2842 4060 5684 7105 14210 28420
Sum of all divisors σ(n): 71820
Sum of proper divisors (its aliquot sum) s(n): 43400
28420 is an abundant number, because the sum of its proper divisors (43400) is greater than itself. Its abundance is 14980

Bases of 28420

Binary: 110111100000100₂
Hexadecimal: 0x6F04
Base-36: LXG

Squares and roots of 28420

28420 squared (28420²) is 807696400
28420 cubed (28420³) 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 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 28420 cubic inches would be around 2.5 feet tall.

Recreational maths with 28420

28420 backwards is 02482
The number of decimal digits it has is: 5
The sum of 28420's digits is 16
More coming soon!

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The information we have on file for 28420 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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