280

280 is an even composite number composed of three prime numbers multiplied together.

What does the number 280 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 16 divisors.

280 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of sixteen divisors.

Prime factorization of 280:

2³ × 5 × 7

(2 × 2 × 2 × 5 × 7)

See below for interesting mathematical facts about the number 280 from the Numbermatics database.

Names of 280

Cardinal: 280 can be written as Two hundred eighty.

Scientific notation

Scientific notation: 2.8 × 10²

Factors of 280

Number of distinct prime factors ω(n): 3
Total number of prime factors Ω(n): 5
Sum of prime factors: 14

Divisors of 280

Number of divisors d(n): 16
Complete list of divisors:
1 2 4 5 7 8 10 14 20 28 35 40 56 70 140 280
Sum of all divisors σ(n): 720
Sum of proper divisors (its aliquot sum) s(n): 440
280 is an abundant number, because the sum of its proper divisors (440) is greater than itself. Its abundance is 160

Bases of 280

Binary: 100011000₂
Hexadecimal: 0x118
Base-36: 7S

Squares and roots of 280

280 squared (280²) is 78400
280 cubed (280³) is 21952000
The square root of 280 is 16.7332005307
The cube root of 280 is 6.5421326203

Scales and comparisons

How big is 280?

280 seconds is equal to 4 minutes, 40 seconds.
To count from 1 to 280 would take you about two 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 280 cubic inches would be around 0.5 feet tall.

Recreational maths with 280

280 backwards is 082
280 is a Harshad number.
The number of decimal digits it has is: 3
The sum of 280's digits is 10
More coming soon!

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The information we have on file for 280 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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