# 385728

## 385,728 is an even composite number composed of four prime numbers multiplied together.

What does the number 385728 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 84 divisors.

385728 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of eighty-four divisors.

## Prime factorization of 385728:

### 26 × 3 × 72 × 41

(2 × 2 × 2 × 2 × 2 × 2 × 3 × 7 × 7 × 41)

See below for interesting mathematical facts about the number 385728 from the Numbermatics database.

### Names of 385728

• Cardinal: 385728 can be written as Three hundred eighty-five thousand, seven hundred twenty-eight.

### Scientific notation

• Scientific notation: 3.85728 × 105

### Factors of 385728

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 53

### Divisors of 385728

• Number of divisors d(n): 84
• Complete list of divisors:
• Sum of all divisors σ(n): 1216152
• Sum of proper divisors (its aliquot sum) s(n): 830424
• 385728 is an abundant number, because the sum of its proper divisors (830424) is greater than itself. Its abundance is 444696

### Bases of 385728

• Binary: 10111100010110000002
• Base-36: 89MO

### Squares and roots of 385728

• 385728 squared (3857282) is 148786089984
• 385728 cubed (3857283) is 57390960917348352
• The square root of 385728 is 621.0700443591
• The cube root of 385728 is 72.7936878157

### Scales and comparisons

How big is 385728?
• 385,728 seconds is equal to 4 days, 11 hours, 8 minutes, 48 seconds.
• To count from 1 to 385,728 would take you about four days.

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 385728 cubic inches would be around 6.1 feet tall.

### Recreational maths with 385728

• 385728 backwards is 827583
• The number of decimal digits it has is: 6
• The sum of 385728's digits is 33
• More coming soon!