18371990

18,371,990 is an even composite number composed of five prime numbers multiplied together.

What does the number 18371990 look like?

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

18371990 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of forty-eight divisors.

Prime factorization of 18371990:

2 × 5 × 7 × 13² × 1553

(2 × 5 × 7 × 13 × 13 × 1553)

See below for interesting mathematical facts about the number 18371990 from the Numbermatics database.

Names of 18371990

Cardinal: 18371990 can be written as Eighteen million, three hundred seventy-one thousand, nine hundred ninety.

Scientific notation

Scientific notation: 1.837199 × 10⁷

Factors of 18371990

Number of distinct prime factors ω(n): 5
Total number of prime factors Ω(n): 6
Sum of prime factors: 1580

Divisors of 18371990

Number of divisors d(n): 48
Complete list of divisors:
1 2 5 7 10 13 14 26 35 65 70 91 130 169 182 338 455 845 910 1183 1553 1690 2366 3106 5915 7765 10871 11830 15530 20189 21742 40378 54355 100945 108710 141323 201890 262457 282646 524914 706615 1312285 1413230 1837199 2624570 3674398 9185995 18371990
Sum of all divisors σ(n): 40951008
Sum of proper divisors (its aliquot sum) s(n): 22579018
18371990 is an abundant number, because the sum of its proper divisors (22579018) is greater than itself. Its abundance is 4207028

Bases of 18371990

Binary: 1000110000101010110010110₂
Hexadecimal: 0x1185596
Base-36: AXRX2

Squares and roots of 18371990

18371990 squared (18371990²) is 337530016560100
18371990 cubed (18371990³) is 6201098088941991599000
The square root of 18371990 is 4286.2559419615
The cube root of 18371990 is 263.8671948351

Scales and comparisons

How big is 18371990?

18,371,990 seconds is equal to 30 weeks, 2 days, 15 hours, 19 minutes, 50 seconds.
To count from 1 to 18,371,990 would take you about forty-five weeks!

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 18371990 cubic inches would be around 22 feet tall.

Recreational maths with 18371990

18371990 backwards is 09917381
The number of decimal digits it has is: 8
The sum of 18371990's digits is 38
More coming soon!

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The information we have on file for 18371990 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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