638 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of eight divisors.
Prime factorization of 638:
2 × 11 × 29
See below for interesting mathematical facts about the number 638 from the Numbermatics database.
Names of 638
- Cardinal: 638 can be written as Six hundred thirty-eight.
- Scientific notation: 6.38 × 102
Factors of 638
Divisors of 638
Bases of 638
- Binary: 10011111102
- Hexadecimal: 0x27E
- Base-36: HQ
Squares and roots of 638
Scales and comparisonsHow big is 638?
- 638 seconds is equal to 10 minutes, 38 seconds.
To count from 1 to 638 would take you about five 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 638 cubic inches would be around 0.7 feet tall.
Recreational maths with 638
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"Number 638 - Facts about the integer". Numbermatics.com. 2021. Web. 23 April 2021.
Numbermatics. (2021). Number 638 - Facts about the integer. Retrieved 23 April 2021, from https://numbermatics.com/n/638/
Numbermatics. 2021. "Number 638 - Facts about the integer". https://numbermatics.com/n/638/
The information we have on file for 638 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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