# 399424

## 399,424 is an even composite number composed of two prime numbers multiplied together.

What does the number 399424 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 21 divisors.

399424 is an even composite number. It is composed of two distinct prime numbers multiplied together. It has a total of twenty-one divisors.

## Prime factorization of 399424:

### 26 × 792

(2 × 2 × 2 × 2 × 2 × 2 × 79 × 79)

See below for interesting mathematical facts about the number 399424 from the Numbermatics database.

### Names of 399424

• Cardinal: 399424 can be written as Three hundred ninety-nine thousand, four hundred twenty-four.

### Scientific notation

• Scientific notation: 3.99424 × 105

### Factors of 399424

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 81

### Divisors of 399424

• Number of divisors d(n): 21
• Complete list of divisors:
• Sum of all divisors σ(n): 802767
• Sum of proper divisors (its aliquot sum) s(n): 403343
• 399424 is an abundant number, because the sum of its proper divisors (403343) is greater than itself. Its abundance is 3919

### Bases of 399424

• Binary: 11000011000010000002
• Base-36: 8K74

### Squares and roots of 399424

• 399424 squared (3994242) is 159539531776
• 399424 cubed (3994243) is 63723917940097024
• 399424 is a perfect square number. Its square root is 632
• The cube root of 399424 is 73.6452462809

### Scales and comparisons

How big is 399424?
• 399,424 seconds is equal to 4 days, 14 hours, 57 minutes, 4 seconds.
• To count from 1 to 399,424 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 399424 cubic inches would be around 6.1 feet tall.

### Recreational maths with 399424

• 399424 backwards is 424993
• The number of decimal digits it has is: 6
• The sum of 399424's digits is 31
• More coming soon!