# 1990

## 1,990 is an even composite number composed of three prime numbers multiplied together.

What does the number 1990 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 8 divisors.

1990 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of eight divisors.

## Prime factorization of 1990:

### 2 × 5 × 199

See below for interesting mathematical facts about the number 1990 from the Numbermatics database.

### Names of 1990

• Cardinal: 1990 can be written as One thousand, nine hundred ninety.

### Scientific notation

• Scientific notation: 1.99 × 103

### Factors of 1990

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 206

### Divisors of 1990

• Number of divisors d(n): 8
• Complete list of divisors:
• Sum of all divisors σ(n): 3600
• Sum of proper divisors (its aliquot sum) s(n): 1610
• 1990 is a deficient number, because the sum of its proper divisors (1610) is less than itself. Its deficiency is 380

### Bases of 1990

• Binary: 111110001102
• Base-36: 1JA

### Squares and roots of 1990

• 1990 squared (19902) is 3960100
• 1990 cubed (19903) is 7880599000
• The square root of 1990 is 44.6094160463
• The cube root of 1990 is 12.5781767195

### Scales and comparisons

How big is 1990?
• 1,990 seconds is equal to 33 minutes, 10 seconds.
• To count from 1 to 1,990 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 1990 cubic inches would be around 1 feet tall.

### Recreational maths with 1990

• 1990 backwards is 0991
• The number of decimal digits it has is: 4
• The sum of 1990's digits is 19
• More coming soon!