# 857

## 857 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 857 look like?

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

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

## Prime factorization of 857:

### 857

See below for interesting mathematical facts about the number 857 from the Numbermatics database.

### Names of 857

• Cardinal: 857 can be written as Eight hundred fifty-seven.

### Scientific notation

• Scientific notation: 8.57 × 102

### Factors of 857

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 857

### Divisors of 857

• Number of divisors d(n): 2
• Complete list of divisors:
• Sum of all divisors σ(n): 858
• Sum of proper divisors (its aliquot sum) s(n): 1
• 857 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 856

### Bases of 857

• Binary: 11010110012
• Base-36: NT

### Squares and roots of 857

• 857 squared (8572) is 734449
• 857 cubed (8573) is 629422793
• The square root of 857 is 29.2745623367
• The cube root of 857 is 9.4986147565

### Scales and comparisons

How big is 857?
• 857 seconds is equal to 14 minutes, 17 seconds.
• To count from 1 to 857 would take you about seven 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 857 cubic inches would be around 0.8 feet tall.

### Recreational maths with 857

• 857 backwards is 758
• 857 is a twin prime! Its twin is 859
• The number of decimal digits it has is: 3
• The sum of 857's digits is 20
• More coming soon!

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The information we have on file for 857 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!

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