# 28728

## 28,728 is an even composite number composed of four prime numbers multiplied together.

What does the number 28728 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 64 divisors.

28728 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of sixty-four divisors.

## Prime factorization of 28728:

### 23 × 33 × 7 × 19

(2 × 2 × 2 × 3 × 3 × 3 × 7 × 19)

See below for interesting mathematical facts about the number 28728 from the Numbermatics database.

### Names of 28728

• Cardinal: 28728 can be written as Twenty-eight thousand, seven hundred twenty-eight.

### Scientific notation

• Scientific notation: 2.8728 × 104

### Factors of 28728

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 31

### Divisors of 28728

• Number of divisors d(n): 64
• Complete list of divisors:
• Sum of all divisors σ(n): 96000
• Sum of proper divisors (its aliquot sum) s(n): 67272
• 28728 is an abundant number, because the sum of its proper divisors (67272) is greater than itself. Its abundance is 38544

### Bases of 28728

• Binary: 1110000001110002
• Base-36: M60

### Squares and roots of 28728

• 28728 squared (287282) is 825297984
• 28728 cubed (287283) is 23709160484352
• The square root of 28728 is 169.4933627019
• The cube root of 28728 is 30.6268123321

### Scales and comparisons

How big is 28728?
• 28,728 seconds is equal to 7 hours, 58 minutes, 48 seconds.
• To count from 1 to 28,728 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 28728 cubic inches would be around 2.6 feet tall.

### Recreational maths with 28728

• 28728 backwards is 82782
• 28728 is a Harshad number.
• The number of decimal digits it has is: 5
• The sum of 28728's digits is 27
• More coming soon!