129440

129,440 is an even composite number composed of three prime numbers multiplied together.

What does the number 129440 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 24 divisors.

129440 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twenty-four divisors.

Prime factorization of 129440:

2⁵ × 5 × 809

(2 × 2 × 2 × 2 × 2 × 5 × 809)

See below for interesting mathematical facts about the number 129440 from the Numbermatics database.

Names of 129440

Cardinal: 129440 can be written as One hundred twenty-nine thousand, four hundred forty.

Scientific notation

Scientific notation: 1.2944 × 10⁵

Factors of 129440

Number of distinct prime factors ω(n): 3
Total number of prime factors Ω(n): 7
Sum of prime factors: 816

Divisors of 129440

Number of divisors d(n): 24
Complete list of divisors:
1 2 4 5 8 10 16 20 32 40 80 160 809 1618 3236 4045 6472 8090 12944 16180 25888 32360 64720 129440
Sum of all divisors σ(n): 306180
Sum of proper divisors (its aliquot sum) s(n): 176740
129440 is an abundant number, because the sum of its proper divisors (176740) is greater than itself. Its abundance is 47300

Bases of 129440

Binary: 11111100110100000₂
Hexadecimal: 0x1F9A0
Base-36: 2RVK

Squares and roots of 129440

129440 squared (129440²) is 16754713600
129440 cubed (129440³) is 2168730128384000
The square root of 129440 is 359.7777091481
The cube root of 129440 is 50.5851258441

Scales and comparisons

How big is 129440?

129,440 seconds is equal to 1 day, 11 hours, 57 minutes, 20 seconds.
To count from 1 to 129,440 would take you about eleven 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 129440 cubic inches would be around 4.2 feet tall.

Recreational maths with 129440

129440 backwards is 044921
129440 is a Harshad number.
The number of decimal digits it has is: 6
The sum of 129440's digits is 20
More coming soon!

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The information we have on file for 129440 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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