# 287

## 287 is an odd composite number composed of two prime numbers multiplied together.

What does the number 287 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 4 divisors.

287 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of four divisors.

## Prime factorization of 287:

### 7 × 41

See below for interesting mathematical facts about the number 287 from the Numbermatics database.

### Names of 287

• Cardinal: 287 can be written as Two hundred eighty-seven.

### Scientific notation

• Scientific notation: 2.87 × 102

### Factors of 287

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 48

### Divisors of 287

• Number of divisors d(n): 4
• Complete list of divisors:
• Sum of all divisors σ(n): 336
• Sum of proper divisors (its aliquot sum) s(n): 49
• 287 is a deficient number, because the sum of its proper divisors (49) is less than itself. Its deficiency is 238

### Bases of 287

• Binary: 1000111112
• Base-36: 7Z

### Squares and roots of 287

• 287 squared (2872) is 82369
• 287 cubed (2873) is 23639903
• The square root of 287 is 16.9410743461
• The cube root of 287 is 6.5962022839

### Scales and comparisons

How big is 287?
• 287 seconds is equal to 4 minutes, 47 seconds.
• To count from 1 to 287 would take you about two minutes.

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 287 cubic inches would be around 0.5 feet tall.

### Recreational maths with 287

• 287 backwards is 782
• The number of decimal digits it has is: 3
• The sum of 287's digits is 17
• More coming soon!