21380000
21,380,000 is an even composite number composed of three prime numbers multiplied together.
21380000 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of sixty divisors.
Prime factorization of 21380000:
25 × 54 × 1069
(2 × 2 × 2 × 2 × 2 × 5 × 5 × 5 × 5 × 1069)See below for interesting mathematical facts about the number 21380000 from the Numbermatics database.
Names of 21380000
- Cardinal: 21380000 can be written as Twenty-one million, three hundred eighty thousand.
Scientific notation
- Scientific notation: 2.138 × 107
Factors of 21380000
Divisors of 21380000
- Number of divisors d(n): 60
-
Complete list of divisors:
1 2 4 5 8 10 16 20 25 32 40 50 80 100 125 160 200 250 400 500 625 800 1000 1069 1250 2000 2138 2500 4000 4276 5000 5345 8552 10000 10690 17104 20000 21380 26725 34208 42760 53450 85520 106900 133625 171040 213800 267250 427600 534500 668125 855200 1069000 1336250 2138000 2672500 4276000 5345000 10690000 21380000
- Sum of all divisors σ(n): 52647210
- Sum of proper divisors (its aliquot sum) s(n): 31267210
- 21380000 is an abundant number, because the sum of its proper divisors (31267210) is greater than itself. Its abundance is 9887210
Bases of 21380000
- Binary: 10100011000111011101000002
- Hexadecimal: 0x1463BA0
- Base-36: CQ8WW
Squares and roots of 21380000
- 21380000 squared (213800002) is 457104400000000
- 21380000 cubed (213800003) is 9772892072000000000000
-
The
square root of 21380000 is 4623.8512086787 -
The
cube root of 21380000 is 277.5465928311
Scales and comparisons
How big is 21380000?- 21,380,000 seconds is equal to 35 weeks, 2 days, 10 hours, 53 minutes, 20 seconds.
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To count from 1 to 21,380,000 would take you about four 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 21380000 cubic inches would be around 23.1 feet tall.
Recreational maths with 21380000
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