640625

640,625 is an odd composite number composed of two prime numbers multiplied together.

What does the number 640625 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 14 divisors.

640625 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of fourteen divisors.

Prime factorization of 640625:

5⁶ × 41

(5 × 5 × 5 × 5 × 5 × 5 × 41)

See below for interesting mathematical facts about the number 640625 from the Numbermatics database.

Names of 640625

Cardinal: 640625 can be written as Six hundred forty thousand, six hundred twenty-five.

Scientific notation

Scientific notation: 6.40625 × 10⁵

Factors of 640625

Number of distinct prime factors ω(n): 2
Total number of prime factors Ω(n): 7
Sum of prime factors: 46

Divisors of 640625

Number of divisors d(n): 14
Complete list of divisors:
1 5 25 41 125 205 625 1025 3125 5125 15625 25625 128125 640625
Sum of all divisors σ(n): 820302
Sum of proper divisors (its aliquot sum) s(n): 179677
640625 is a deficient number, because the sum of its proper divisors (179677) is less than itself. Its deficiency is 460948

Bases of 640625

Binary: 10011100011001110001₂
Hexadecimal: 0x9C671
Base-36: DQB5

Squares and roots of 640625

640625 squared (640625²) is 410400390625
640625 cubed (640625³) is 262912750244140625
The square root of 640625 is 800.3905296793
The cube root of 640625 is 86.2054310095

Scales and comparisons

How big is 640625?

640,625 seconds is equal to 1 week, 9 hours, 57 minutes, 5 seconds.
To count from 1 to 640,625 would take you about nine 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 640625 cubic inches would be around 7.2 feet tall.

Recreational maths with 640625

640625 backwards is 526046
The number of decimal digits it has is: 6
The sum of 640625's digits is 23
More coming soon!

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The information we have on file for 640625 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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