# 1989

## 1,989 is an odd composite number composed of three prime numbers multiplied together.

What does the number 1989 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 12 divisors.

1989 is an odd composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twelve divisors.

## Prime factorization of 1989:

### 32 × 13 × 17

(3 × 3 × 13 × 17)

See below for interesting mathematical facts about the number 1989 from the Numbermatics database.

### Names of 1989

• Cardinal: 1989 can be written as One thousand, nine hundred eighty-nine.

### Scientific notation

• Scientific notation: 1.989 × 103

### Factors of 1989

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 33

### Divisors of 1989

• Number of divisors d(n): 12
• Complete list of divisors:
• Sum of all divisors σ(n): 3276
• Sum of proper divisors (its aliquot sum) s(n): 1287
• 1989 is a deficient number, because the sum of its proper divisors (1287) is less than itself. Its deficiency is 702

### Bases of 1989

• Binary: 111110001012
• Base-36: 1J9

### Squares and roots of 1989

• 1989 squared (19892) is 3956121
• 1989 cubed (19893) is 7868724669
• The square root of 1989 is 44.5982062419
• The cube root of 1989 is 12.5760694691

### Scales and comparisons

How big is 1989?
• 1,989 seconds is equal to 33 minutes, 9 seconds.
• To count from 1 to 1,989 would take you about thirty-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 1989 cubic inches would be around 1 feet tall.

### Recreational maths with 1989

• 1989 backwards is 9891
• The number of decimal digits it has is: 4
• The sum of 1989's digits is 27
• More coming soon!

HTML: To link to this page, just copy and paste the link below into your blog, web page or email.

BBCODE: To link to this page in a forum post or comment box, just copy and paste the link code below: