12840

12,840 is an even composite number composed of four prime numbers multiplied together.

What does the number 12840 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 32 divisors.

12840 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of thirty-two divisors.

Prime factorization of 12840:

2³ × 3 × 5 × 107

(2 × 2 × 2 × 3 × 5 × 107)

See below for interesting mathematical facts about the number 12840 from the Numbermatics database.

Names of 12840

Cardinal: 12840 can be written as Twelve thousand, eight hundred forty.

Scientific notation

Scientific notation: 1.284 × 10⁴

Factors of 12840

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 6
Sum of prime factors: 117

Divisors of 12840

Number of divisors d(n): 32
Complete list of divisors:
1 2 3 4 5 6 8 10 12 15 20 24 30 40 60 107 120 214 321 428 535 642 856 1070 1284 1605 2140 2568 3210 4280 6420 12840
Sum of all divisors σ(n): 38880
Sum of proper divisors (its aliquot sum) s(n): 26040
12840 is an abundant number, because the sum of its proper divisors (26040) is greater than itself. Its abundance is 13200

Bases of 12840

Binary: 11001000101000₂
Hexadecimal: 0x3228
Base-36: 9WO

Squares and roots of 12840

12840 squared (12840²) is 164865600
12840 cubed (12840³) is 2116874304000
The square root of 12840 is 113.3137237937
The cube root of 12840 is 23.4164833821

Scales and comparisons

How big is 12840?

12,840 seconds is equal to 3 hours, 34 minutes.
To count from 1 to 12,840 would take you about three 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 12840 cubic inches would be around 2 feet tall.

Recreational maths with 12840

12840 backwards is 04821
12840 is a Harshad number.
The number of decimal digits it has is: 5
The sum of 12840's digits is 15
More coming soon!

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The information we have on file for 12840 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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