28206721

28,206,721 is an odd composite number composed of two prime numbers multiplied together.

What does the number 28206721 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 9 divisors.

28206721 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of nine divisors.

Prime factorization of 28206721:

47² × 113²

(47 × 47 × 113 × 113)

See below for interesting mathematical facts about the number 28206721 from the Numbermatics database.

Names of 28206721

Cardinal: 28206721 can be written as Twenty-eight million, two hundred six thousand, seven hundred twenty-one.

Scientific notation

Scientific notation: 2.8206721 × 10⁷

Factors of 28206721

Number of distinct prime factors ω(n): 2
Total number of prime factors Ω(n): 4
Sum of prime factors: 160

Divisors of 28206721

Number of divisors d(n): 9
Complete list of divisors:
1 47 113 2209 5311 12769 249617 600143 28206721
Sum of all divisors σ(n): 29076931
Sum of proper divisors (its aliquot sum) s(n): 870210
28206721 is a deficient number, because the sum of its proper divisors (870210) is less than itself. Its deficiency is 27336511

Bases of 28206721

Binary: 1101011100110011010000001₂
Hexadecimal: 0x1AE6681
Base-36: GSKG1

Squares and roots of 28206721

28206721 squared (28206721²) is 795619109571841
28206721 cubed (28206721³) is 22441806245961348543361
28206721 is a perfect square number. Its square root is 5311
The cube root of 28206721 is 304.4043593315

Scales and comparisons

How big is 28206721?

28,206,721 seconds is equal to 46 weeks, 4 days, 11 hours, 12 minutes, 1 second.
To count from 1 to 28,206,721 would take you about seventeen weeks!

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 28206721 cubic inches would be around 25.4 feet tall.

Recreational maths with 28206721

28206721 backwards is 12760282
The number of decimal digits it has is: 8
The sum of 28206721's digits is 28
More coming soon!

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The information we have on file for 28206721 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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