# 389

## 389 is a prime number. Like all primes greater than two, it is odd and has no factors apart from itself and one.

What does the number 389 look like?

As a prime, it is not composed of any other numbers and has no internal structure.

389 is a prime number. Like all primes (except two), it is an odd number.

## Prime factorization of 389:

### 389

See below for interesting mathematical facts about the number 389 from the Numbermatics database.

### Names of 389

• Cardinal: 389 can be written as Three hundred eighty-nine.

### Scientific notation

• Scientific notation: 3.89 × 102

### Factors of 389

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 389

### Divisors of 389

• Number of divisors d(n): 2
• Complete list of divisors:
• Sum of all divisors σ(n): 390
• Sum of proper divisors (its aliquot sum) s(n): 1
• 389 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 388

### Bases of 389

• Binary: 1100001012
• Base-36: AT

### Squares and roots of 389

• 389 squared (3892) is 151321
• 389 cubed (3893) is 58863869
• The square root of 389 is 19.7230829233
• The cube root of 389 is 7.2998936619

### Scales and comparisons

How big is 389?
• 389 seconds is equal to 6 minutes, 29 seconds.
• To count from 1 to 389 would take you about three 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 389 cubic inches would be around 0.6 feet tall.

### Recreational maths with 389

• 389 backwards is 983
• The number of decimal digits it has is: 3
• The sum of 389's digits is 20
• More coming soon!