# 445

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

What does the number 445 look like?

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

445 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 445:

### 5 × 89

See below for interesting mathematical facts about the number 445 from the Numbermatics database.

### Names of 445

• Cardinal: 445 can be written as Four hundred forty-five.

### Scientific notation

• Scientific notation: 4.45 × 102

### Factors of 445

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 94

### Divisors of 445

• Number of divisors d(n): 4
• Complete list of divisors:
• Sum of all divisors σ(n): 540
• Sum of proper divisors (its aliquot sum) s(n): 95
• 445 is a deficient number, because the sum of its proper divisors (95) is less than itself. Its deficiency is 350

### Bases of 445

• Binary: 1101111012
• Base-36: CD

### Squares and roots of 445

• 445 squared (4452) is 198025
• 445 cubed (4453) is 88121125
• The square root of 445 is 21.0950231097
• The cube root of 445 is 7.6346067215

### Scales and comparisons

How big is 445?
• 445 seconds is equal to 7 minutes, 25 seconds.
• To count from 1 to 445 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 445 cubic inches would be around 0.6 feet tall.

### Recreational maths with 445

• 445 backwards is 544
• The number of decimal digits it has is: 3
• The sum of 445's digits is 13
• More coming soon!