# 987840

## 987,840 is an even composite number composed of four prime numbers multiplied together.

What does the number 987840 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 168 divisors.

987840 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of one hundred sixty-eight divisors.

## Prime factorization of 987840:

### 26 × 32 × 5 × 73

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

See below for interesting mathematical facts about the number 987840 from the Numbermatics database.

### Names of 987840

• Cardinal: 987840 can be written as Nine hundred eighty-seven thousand, eight hundred forty.

### Scientific notation

• Scientific notation: 9.8784 × 105

### Factors of 987840

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 17

### Divisors of 987840

• Number of divisors d(n): 168
• Complete list of divisors:
• Sum of all divisors σ(n): 3962400
• Sum of proper divisors (its aliquot sum) s(n): 2974560
• 987840 is an abundant number, because the sum of its proper divisors (2974560) is greater than itself. Its abundance is 1986720

### Bases of 987840

• Binary: 111100010010110000002
• Base-36: L680

### Squares and roots of 987840

• 987840 squared (9878402) is 975827865600
• 987840 cubed (9878403) is 963961798754304000
• The square root of 987840 is 993.9014035607
• The cube root of 987840 is 99.5930125257

### Scales and comparisons

How big is 987840?
• 987,840 seconds is equal to 1 week, 4 days, 10 hours, 24 minutes.
• To count from 1 to 987,840 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 987840 cubic inches would be around 8.3 feet tall.

### Recreational maths with 987840

• 987840 backwards is 048789
• 987840 is a Harshad number.
• The number of decimal digits it has is: 6
• The sum of 987840's digits is 36
• More coming soon!