28665

28,665 is an odd composite number composed of four prime numbers multiplied together.

What does the number 28665 look like?

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

28665 is an odd composite number. It is composed of four distinct prime numbers multiplied together. It has a total of thirty-six divisors.

Prime factorization of 28665:

3² × 5 × 7² × 13

(3 × 3 × 5 × 7 × 7 × 13)

See below for interesting mathematical facts about the number 28665 from the Numbermatics database.

Names of 28665

Cardinal: 28665 can be written as Twenty-eight thousand, six hundred sixty-five.

Scientific notation

Scientific notation: 2.8665 × 10⁴

Factors of 28665

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 6
Sum of prime factors: 28

Divisors of 28665

Number of divisors d(n): 36
Complete list of divisors:
1 3 5 7 9 13 15 21 35 39 45 49 63 65 91 105 117 147 195 245 273 315 441 455 585 637 735 819 1365 1911 2205 3185 4095 5733 9555 28665
Sum of all divisors σ(n): 62244
Sum of proper divisors (its aliquot sum) s(n): 33579
28665 is an abundant number, because the sum of its proper divisors (33579) is greater than itself. Its abundance is 4914

Bases of 28665

Binary: 110111111111001₂
Hexadecimal: 0x6FF9
Base-36: M49

Squares and roots of 28665

28665 squared (28665²) is 821682225
28665 cubed (28665³) is 23553520979625
The square root of 28665 is 169.3074127143
The cube root of 28665 is 30.6044079259

Scales and comparisons

How big is 28665?

28,665 seconds is equal to 7 hours, 57 minutes, 45 seconds.
To count from 1 to 28,665 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 28665 cubic inches would be around 2.6 feet tall.

Recreational maths with 28665

28665 backwards is 56682
The number of decimal digits it has is: 5
The sum of 28665's digits is 27
More coming soon!

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The information we have on file for 28665 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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