# 869

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

What does the number 869 look like?

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

869 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 869:

### 11 × 79

See below for interesting mathematical facts about the number 869 from the Numbermatics database.

### Names of 869

• Cardinal: 869 can be written as Eight hundred sixty-nine.

### Scientific notation

• Scientific notation: 8.69 × 102

### Factors of 869

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 90

### Divisors of 869

• Number of divisors d(n): 4
• Complete list of divisors:
• Sum of all divisors σ(n): 960
• Sum of proper divisors (its aliquot sum) s(n): 91
• 869 is a deficient number, because the sum of its proper divisors (91) is less than itself. Its deficiency is 778

### Bases of 869

• Binary: 11011001012
• Base-36: O5

### Squares and roots of 869

• 869 squared (8692) is 755161
• 869 cubed (8693) is 656234909
• The square root of 869 is 29.4788059459
• The cube root of 869 is 9.5427436815

### Scales and comparisons

How big is 869?
• 869 seconds is equal to 14 minutes, 29 seconds.
• To count from 1 to 869 would take you about seven 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 869 cubic inches would be around 0.8 feet tall.

### Recreational maths with 869

• 869 backwards is 968
• The number of decimal digits it has is: 3
• The sum of 869's digits is 23
• More coming soon!