# 28784

## 28,784 is an even composite number composed of three prime numbers multiplied together.

What does the number 28784 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 20 divisors.

28784 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twenty divisors.

## Prime factorization of 28784:

### 24 × 7 × 257

(2 × 2 × 2 × 2 × 7 × 257)

See below for interesting mathematical facts about the number 28784 from the Numbermatics database.

### Names of 28784

• Cardinal: 28784 can be written as Twenty-eight thousand, seven hundred eighty-four.

### Scientific notation

• Scientific notation: 2.8784 × 104

### Factors of 28784

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 266

### Divisors of 28784

• Number of divisors d(n): 20
• Complete list of divisors:
• Sum of all divisors σ(n): 63984
• Sum of proper divisors (its aliquot sum) s(n): 35200
• 28784 is an abundant number, because the sum of its proper divisors (35200) is greater than itself. Its abundance is 6416

### Bases of 28784

• Binary: 1110000011100002
• Base-36: M7K

### Squares and roots of 28784

• 28784 squared (287842) is 828518656
• 28784 cubed (287843) is 23848080994304
• The square root of 28784 is 169.6584804835
• The cube root of 28784 is 30.6466998781

### Scales and comparisons

How big is 28784?
• 28,784 seconds is equal to 7 hours, 59 minutes, 44 seconds.
• To count from 1 to 28,784 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 28784 cubic inches would be around 2.6 feet tall.

### Recreational maths with 28784

• 28784 backwards is 48782
• The number of decimal digits it has is: 5
• The sum of 28784's digits is 29
• More coming soon!