640997640

640,997,640 is an even composite number composed of four prime numbers multiplied together.

What does the number 640997640 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 48 divisors.

640997640 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of forty-eight divisors.

Prime factorization of 640997640:

2³ × 3² × 5 × 1780549

(2 × 2 × 2 × 3 × 3 × 5 × 1780549)

See below for interesting mathematical facts about the number 640997640 from the Numbermatics database.

Names of 640997640

Cardinal: 640997640 can be written as Six hundred forty million, nine hundred ninety-seven thousand, six hundred forty.

Scientific notation

Scientific notation: 6.4099764 × 10⁸

Factors of 640997640

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 7
Sum of prime factors: 1780559

Divisors of 640997640

Number of divisors d(n): 48
Complete list of divisors:
1 2 3 4 5 6 8 9 10 12 15 18 20 24 30 36 40 45 60 72 90 120 180 360 1780549 3561098 5341647 7122196 8902745 10683294 14244392 16024941 17805490 21366588 26708235 32049882 35610980 42733176 53416470 64099764 71221960 80124705 106832940 128199528 160249410 213665880 320498820 640997640
Sum of all divisors σ(n): 2083243500
Sum of proper divisors (its aliquot sum) s(n): 1442245860
640997640 is an abundant number, because the sum of its proper divisors (1442245860) is greater than itself. Its abundance is 801248220

Bases of 640997640

Binary: 100110001101001101100100001000₂
Hexadecimal: 0x2634D908
Base-36: ALMSY0

Squares and roots of 640997640

640997640 squared (640997640²) is 410877974485569600
640997640 cubed (640997640³) is 263371811973230327655744000
The square root of 640997640 is 25317.9311951035
The cube root of 640997640 is 862.2214248417

Scales and comparisons

How big is 640997640?

640,997,640 seconds is equal to 20 years, 19 weeks, 5 days, 22 hours, 54 minutes.
To count from 1 to 640,997,640 would take you about thirty years!

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 640997640 cubic inches would be around 71.9 feet tall.

Recreational maths with 640997640

640997640 backwards is 046799046
640997640 is a Harshad number.
The number of decimal digits it has is: 9
The sum of 640997640's digits is 45
More coming soon!

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The information we have on file for 640997640 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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