# 1820813

## 1,820,813 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 1820813 look like?

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

1820813 is a prime number. Like all primes (except two), it is an odd number.

## Prime factorization of 1820813:

### 1820813

See below for interesting mathematical facts about the number 1820813 from the Numbermatics database.

### Names of 1820813

• Cardinal: 1820813 can be written as One million, eight hundred twenty thousand, eight hundred thirteen.

### Scientific notation

• Scientific notation: 1.820813 × 106

### Factors of 1820813

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 1820813

### Divisors of 1820813

• Number of divisors d(n): 2
• Complete list of divisors:
• Sum of all divisors σ(n): 1820814
• Sum of proper divisors (its aliquot sum) s(n): 1
• 1820813 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 1820812

### Bases of 1820813

• Binary: 1101111001000100011012
• Base-36: 130Y5

### Squares and roots of 1820813

• 1820813 squared (18208132) is 3315359980969
• 1820813 cubed (18208133) is 6036650553028107797
• The square root of 1820813 is 1349.3750405281
• The cube root of 1820813 is 122.1110920375

### Scales and comparisons

How big is 1820813?
• 1,820,813 seconds is equal to 3 weeks, 1 hour, 46 minutes, 53 seconds.
• To count from 1 to 1,820,813 would take you about four weeks!

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 1820813 cubic inches would be around 10.2 feet tall.

### Recreational maths with 1820813

• 1820813 backwards is 3180281
• The number of decimal digits it has is: 7
• The sum of 1820813's digits is 23
• More coming soon!