640395

640,395 is an odd composite number composed of five prime numbers multiplied together.

What does the number 640395 look like?

This visualization shows the relationship between its 5 prime factors (large circles) and 48 divisors.

640395 is an odd composite number. It is composed of five distinct prime numbers multiplied together. It has a total of forty-eight divisors.

Prime factorization of 640395:

3² × 5 × 7 × 19 × 107

(3 × 3 × 5 × 7 × 19 × 107)

See below for interesting mathematical facts about the number 640395 from the Numbermatics database.

Names of 640395

Cardinal: 640395 can be written as Six hundred forty thousand, three hundred ninety-five.

Scientific notation

Scientific notation: 6.40395 × 10⁵

Factors of 640395

Number of distinct prime factors ω(n): 5
Total number of prime factors Ω(n): 6
Sum of prime factors: 141

Divisors of 640395

Number of divisors d(n): 48
Complete list of divisors:
1 3 5 7 9 15 19 21 35 45 57 63 95 105 107 133 171 285 315 321 399 535 665 749 855 963 1197 1605 1995 2033 2247 3745 4815 5985 6099 6741 10165 11235 14231 18297 30495 33705 42693 71155 91485 128079 213465 640395
Sum of all divisors σ(n): 1347840
Sum of proper divisors (its aliquot sum) s(n): 707445
640395 is an abundant number, because the sum of its proper divisors (707445) is greater than itself. Its abundance is 67050

Bases of 640395

Binary: 10011100010110001011₂
Hexadecimal: 0x9C58B
Base-36: DQ4R

Squares and roots of 640395

640395 squared (640395²) is 410105756025
640395 cubed (640395³) is 262629675629629875
The square root of 640395 is 800.2468369197
The cube root of 640395 is 86.1951131573

Scales and comparisons

How big is 640395?

640,395 seconds is equal to 1 week, 9 hours, 53 minutes, 15 seconds.
To count from 1 to 640,395 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 640395 cubic inches would be around 7.2 feet tall.

Recreational maths with 640395

640395 backwards is 593046
The number of decimal digits it has is: 6
The sum of 640395's digits is 27
More coming soon!

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The information we have on file for 640395 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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