21428810

21,428,810 is an even composite number composed of four prime numbers multiplied together.

What does the number 21428810 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 16 divisors.

21428810 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of sixteen divisors.

Prime factorization of 21428810:

2 × 5 × 13 × 164837

See below for interesting mathematical facts about the number 21428810 from the Numbermatics database.

Names of 21428810

Cardinal: 21428810 can be written as Twenty-one million, four hundred twenty-eight thousand, eight hundred ten.

Scientific notation

Scientific notation: 2.142881 × 10⁷

Factors of 21428810

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 4
Sum of prime factors: 164857

Divisors of 21428810

Number of divisors d(n): 16
Complete list of divisors:
1 2 5 10 13 26 65 130 164837 329674 824185 1648370 2142881 4285762 10714405 21428810
Sum of all divisors σ(n): 41539176
Sum of proper divisors (its aliquot sum) s(n): 20110366
21428810 is a deficient number, because the sum of its proper divisors (20110366) is less than itself. Its deficiency is 1318444

Bases of 21428810

Binary: 1010001101111101001001010₂
Hexadecimal: 0x146FA4A
Base-36: CRAKQ

Squares and roots of 21428810

21428810 squared (21428810²) is 459193898016100
21428810 cubed (21428810³) is 9839978793746383841000
The square root of 21428810 is 4629.1262674505
The cube root of 21428810 is 277.7576429257

Scales and comparisons

How big is 21428810?

21,428,810 seconds is equal to 35 weeks, 3 days, 26 minutes, 50 seconds.
To count from 1 to 21,428,810 would take you about forty 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 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 21428810 cubic inches would be around 23.1 feet tall.

Recreational maths with 21428810

21428810 backwards is 01882412
21428810 is a Harshad number.
The number of decimal digits it has is: 8
The sum of 21428810's digits is 26
More coming soon!

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The information we have on file for 21428810 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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