28561

28,561 is an odd composite number. It is composed of a single prime number multiplied by itself three times.

What does the number 28561 look like?

This visualization shows the relationship between its 1 prime factors (large circles) and 5 divisors.

28561 is an odd composite number. It is composed of one distinct prime number multiplied by itself three times. It has a total of five divisors.

Prime factorization of 28561:

134

(13 × 13 × 13 × 13)

See below for interesting mathematical facts about the number 28561 from the Numbermatics database.

Names of 28561

• Cardinal: 28561 can be written as Twenty-eight thousand, five hundred sixty-one.

Scientific notation

• Scientific notation: 2.8561 × 104

Factors of 28561

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 13

Divisors of 28561

• Number of divisors d(n): 5
• Complete list of divisors:
• Sum of all divisors σ(n): 30941
• Sum of proper divisors (its aliquot sum) s(n): 2380
• 28561 is a deficient number, because the sum of its proper divisors (2380) is less than itself. Its deficiency is 26181

Bases of 28561

• Binary: 1101111100100012
• Base-36: M1D

Squares and roots of 28561

• 28561 squared (285612) is 815730721
• 28561 cubed (285613) is 23298085122481
• 28561 is a perfect square number. Its square root is 169
• The cube root of 28561 is 30.5673509403

Scales and comparisons

How big is 28561?
• 28,561 seconds is equal to 7 hours, 56 minutes, 1 second.
• To count from 1 to 28,561 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 28561 cubic inches would be around 2.5 feet tall.

Recreational maths with 28561

• 28561 backwards is 16582
• The number of decimal digits it has is: 5
• The sum of 28561's digits is 22
• More coming soon!