# 1985

## 1,985 is an odd composite number composed of two prime numbers multiplied together.

What does the number 1985 look like?

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

1985 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 1985:

### 5 × 397

See below for interesting mathematical facts about the number 1985 from the Numbermatics database.

### Names of 1985

• Cardinal: 1985 can be written as One thousand, nine hundred eighty-five.

### Scientific notation

• Scientific notation: 1.985 × 103

### Factors of 1985

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 402

### Divisors of 1985

• Number of divisors d(n): 4
• Complete list of divisors:
• Sum of all divisors σ(n): 2388
• Sum of proper divisors (its aliquot sum) s(n): 403
• 1985 is a deficient number, because the sum of its proper divisors (403) is less than itself. Its deficiency is 1582

### Bases of 1985

• Binary: 111110000012
• Base-36: 1J5

### Squares and roots of 1985

• 1985 squared (19852) is 3940225
• 1985 cubed (19853) is 7821346625
• The square root of 1985 is 44.5533388197
• The cube root of 1985 is 12.5676333979

### Scales and comparisons

How big is 1985?
• 1,985 seconds is equal to 33 minutes, 5 seconds.
• To count from 1 to 1,985 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 1985 cubic inches would be around 1 feet tall.

### Recreational maths with 1985

• 1985 backwards is 5891
• The number of decimal digits it has is: 4
• The sum of 1985's digits is 23
• More coming soon!