128440

128,440 is an even composite number composed of four prime numbers multiplied together.

What does the number 128440 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 48 divisors.

128440 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of forty-eight divisors.

Prime factorization of 128440:

2³ × 5 × 13² × 19

(2 × 2 × 2 × 5 × 13 × 13 × 19)

See below for interesting mathematical facts about the number 128440 from the Numbermatics database.

Names of 128440

Cardinal: 128440 can be written as One hundred twenty-eight thousand, four hundred forty.

Scientific notation

Scientific notation: 1.2844 × 10⁵

Factors of 128440

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 7
Sum of prime factors: 39

Divisors of 128440

Number of divisors d(n): 48
Complete list of divisors:
1 2 4 5 8 10 13 19 20 26 38 40 52 65 76 95 104 130 152 169 190 247 260 338 380 494 520 676 760 845 988 1235 1352 1690 1976 2470 3211 3380 4940 6422 6760 9880 12844 16055 25688 32110 64220 128440
Sum of all divisors σ(n): 329400
Sum of proper divisors (its aliquot sum) s(n): 200960
128440 is an abundant number, because the sum of its proper divisors (200960) is greater than itself. Its abundance is 72520

Bases of 128440

Binary: 11111010110111000₂
Hexadecimal: 0x1F5B8
Base-36: 2R3S

Squares and roots of 128440

128440 squared (128440²) is 16496833600
128440 cubed (128440³) is 2118853307584000
The square root of 128440 is 358.3852675543
The cube root of 128440 is 50.4545223355

Scales and comparisons

How big is 128440?

128,440 seconds is equal to 1 day, 11 hours, 40 minutes, 40 seconds.
To count from 1 to 128,440 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 128440 cubic inches would be around 4.2 feet tall.

Recreational maths with 128440

128440 backwards is 044821
128440 is a Harshad number.
The number of decimal digits it has is: 6
The sum of 128440's digits is 19
More coming soon!

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The information we have on file for 128440 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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