# 2891

## 2,891 is an odd composite number composed of two prime numbers multiplied together.

What does the number 2891 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 6 divisors.

2891 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of six divisors.

## Prime factorization of 2891:

### 72 × 59

(7 × 7 × 59)

See below for interesting mathematical facts about the number 2891 from the Numbermatics database.

### Names of 2891

• Cardinal: 2891 can be written as Two thousand, eight hundred ninety-one.

### Scientific notation

• Scientific notation: 2.891 × 103

### Factors of 2891

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 66

### Divisors of 2891

• Number of divisors d(n): 6
• Complete list of divisors:
• Sum of all divisors σ(n): 3420
• Sum of proper divisors (its aliquot sum) s(n): 529
• 2891 is a deficient number, because the sum of its proper divisors (529) is less than itself. Its deficiency is 2362

### Bases of 2891

• Binary: 1011010010112
• Base-36: 28B

### Squares and roots of 2891

• 2891 squared (28912) is 8357881
• 2891 cubed (28913) is 24162633971
• The square root of 2891 is 53.7680202351
• The cube root of 2891 is 14.2456640137

### Scales and comparisons

How big is 2891?
• 2,891 seconds is equal to 48 minutes, 11 seconds.
• To count from 1 to 2,891 would take you about forty-eight 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 2891 cubic inches would be around 1.2 feet tall.

### Recreational maths with 2891

• 2891 backwards is 1982
• The number of decimal digits it has is: 4
• The sum of 2891's digits is 20
• More coming soon!