90 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twelve divisors.
Prime factorization of 90:
2 × 32 × 5(2 × 3 × 3 × 5)
See below for interesting mathematical facts about the number 90 from the Numbermatics database.
Names of 90
- Cardinal: 90 can be written as Ninety.
- Scientific notation: 9 × 101
Factors of 90
Divisors of 90
Bases of 90
- Binary: 10110102
- Hexadecimal: 0x5A
- Base-36: 2I
Squares and roots of 90
Scales and comparisonsHow big is 90?
- 90 seconds is equal to 1 minute, 30 seconds.
To count from 1 to 90 would take you about forty-five seconds.
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 90 cubic inches would be around 0.4 feet tall.
Recreational maths with 90
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"Number 90 - Facts about the integer". Numbermatics.com. 2022. Web. 6 December 2022.
Numbermatics. (2022). Number 90 - Facts about the integer. Retrieved 6 December 2022, from https://numbermatics.com/n/90/
Numbermatics. 2022. "Number 90 - Facts about the integer". https://numbermatics.com/n/90/
The information we have on file for 90 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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