# 3991680

## 3,991,680 is an even composite number composed of five prime numbers multiplied together.

What does the number 3991680 look like?

This visualization shows the relationship between its 5 prime factors (large circles) and 320 divisors.

3991680 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of three hundred twenty divisors.

## Prime factorization of 3991680:

### 27 × 34 × 5 × 7 × 11

(2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 3 × 3 × 3 × 5 × 7 × 11)

See below for interesting mathematical facts about the number 3991680 from the Numbermatics database.

### Names of 3991680

• Cardinal: 3991680 can be written as Three million, nine hundred ninety-one thousand, six hundred eighty.

### Scientific notation

• Scientific notation: 3.99168 × 106

### Factors of 3991680

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 28

### Divisors of 3991680

• Number of divisors d(n): 320
• Complete list of divisors:
• Sum of all divisors σ(n): 17772480
• Sum of proper divisors (its aliquot sum) s(n): 13780800
• 3991680 is an abundant number, because the sum of its proper divisors (13780800) is greater than itself. Its abundance is 9789120

### Bases of 3991680

• Binary: 11110011101000100000002
• Base-36: 2DK00

### Squares and roots of 3991680

• 3991680 squared (39916802) is 15933509222400
• 3991680 cubed (39916803) is 63601470092869632000
• The square root of 3991680 is 1997.9189172737
• The cube root of 3991680 is 158.6299689941

### Scales and comparisons

How big is 3991680?
• 3,991,680 seconds is equal to 6 weeks, 4 days, 4 hours, 48 minutes.
• To count from 1 to 3,991,680 would take you about nine weeks!

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 3991680 cubic inches would be around 13.2 feet tall.

### Recreational maths with 3991680

• 3991680 backwards is 0861993
• 3991680 is a Harshad number.
• The number of decimal digits it has is: 7
• The sum of 3991680's digits is 36
• More coming soon!