28215

28,215 is an odd composite number composed of four prime numbers multiplied together.

What does the number 28215 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 32 divisors.

28215 is an odd composite number. It is composed of four distinct prime numbers multiplied together. It has a total of thirty-two divisors.

Prime factorization of 28215:

3³ × 5 × 11 × 19

(3 × 3 × 3 × 5 × 11 × 19)

See below for interesting mathematical facts about the number 28215 from the Numbermatics database.

Names of 28215

Cardinal: 28215 can be written as Twenty-eight thousand, two hundred fifteen.

Scientific notation

Scientific notation: 2.8215 × 10⁴

Factors of 28215

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 6
Sum of prime factors: 38

Divisors of 28215

Number of divisors d(n): 32
Complete list of divisors:
1 3 5 9 11 15 19 27 33 45 55 57 95 99 135 165 171 209 285 297 495 513 627 855 1045 1485 1881 2565 3135 5643 9405 28215
Sum of all divisors σ(n): 57600
Sum of proper divisors (its aliquot sum) s(n): 29385
28215 is an abundant number, because the sum of its proper divisors (29385) is greater than itself. Its abundance is 1170

Bases of 28215

Binary: 110111000110111₂
Hexadecimal: 0x6E37
Base-36: LRR

Squares and roots of 28215

28215 squared (28215²) is 796086225
28215 cubed (28215³) is 22461572838375
The square root of 28215 is 167.9732121501
The cube root of 28215 is 30.4434138489

Scales and comparisons

How big is 28215?

28,215 seconds is equal to 7 hours, 50 minutes, 15 seconds.
To count from 1 to 28,215 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 28215 cubic inches would be around 2.5 feet tall.

Recreational maths with 28215

28215 backwards is 51282
The number of decimal digits it has is: 5
The sum of 28215's digits is 18
More coming soon!

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The information we have on file for 28215 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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