640831

640,831 is an odd composite number composed of two prime numbers multiplied together.

What does the number 640831 look like?

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

640831 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 640831:

509 × 1259

See below for interesting mathematical facts about the number 640831 from the Numbermatics database.

Names of 640831

Cardinal: 640831 can be written as Six hundred forty thousand, eight hundred thirty-one.

Scientific notation

Scientific notation: 6.40831 × 10⁵

Factors of 640831

Number of distinct prime factors ω(n): 2
Total number of prime factors Ω(n): 2
Sum of prime factors: 1768

Divisors of 640831

Number of divisors d(n): 4
Complete list of divisors:
1 509 1259 640831
Sum of all divisors σ(n): 642600
Sum of proper divisors (its aliquot sum) s(n): 1769
640831 is a deficient number, because the sum of its proper divisors (1769) is less than itself. Its deficiency is 639062

Bases of 640831

Binary: 10011100011100111111₂
Hexadecimal: 0x9C73F
Base-36: DQGV

Squares and roots of 640831

640831 squared (640831²) is 410664370561
640831 cubed (640831³) is 263166459250976191
The square root of 640831 is 800.5192065153
The cube root of 640831 is 86.2146701201

Scales and comparisons

How big is 640831?

640,831 seconds is equal to 1 week, 10 hours, 31 seconds.
To count from 1 to 640,831 would take you about ten hours!

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 640831 cubic inches would be around 7.2 feet tall.

Recreational maths with 640831

640831 backwards is 138046
The number of decimal digits it has is: 6
The sum of 640831's digits is 22
More coming soon!

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The information we have on file for 640831 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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