128428

128,428 is an even composite number composed of three prime numbers multiplied together.

What does the number 128428 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 12 divisors.

128428 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twelve divisors.

Prime factorization of 128428:

22 × 97 × 331

(2 × 2 × 97 × 331)

See below for interesting mathematical facts about the number 128428 from the Numbermatics database.


Names of 128428

  • Cardinal: 128428 can be written as One hundred twenty-eight thousand, four hundred twenty-eight.

Scientific notation

  • Scientific notation: 1.28428 × 105

Factors of 128428

  • Number of distinct prime factors ω(n): 3
  • Total number of prime factors Ω(n): 4
  • Sum of prime factors: 430

Divisors of 128428

  • Number of divisors d(n): 12
  • Complete list of divisors:
  • Sum of all divisors σ(n): 227752
  • Sum of proper divisors (its aliquot sum) s(n): 99324
  • 128428 is a deficient number, because the sum of its proper divisors (99324) is less than itself. Its deficiency is 29104

Bases of 128428

  • Binary: 111110101101011002
  • Hexadecimal: 0x1F5AC
  • Base-36: 2R3G

Squares and roots of 128428

  • 128428 squared (1284282) is 16493751184
  • 128428 cubed (1284283) is 2118259477058752
  • The square root of 128428 is 358.3685254037
  • The cube root of 128428 is 50.4529509839

Scales and comparisons

How big is 128428?
  • 128,428 seconds is equal to 1 day, 11 hours, 40 minutes, 28 seconds.
  • To count from 1 to 128,428 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 128428 cubic inches would be around 4.2 feet tall.

Recreational maths with 128428

  • 128428 backwards is 824821
  • The number of decimal digits it has is: 6
  • The sum of 128428's digits is 25
  • More coming soon!

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"Number 128428 - Facts about the integer". Numbermatics.com. 2024. Web. 29 March 2024.

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Numbermatics. (2024). Number 128428 - Facts about the integer. Retrieved 29 March 2024, from https://numbermatics.com/n/128428/

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The information we have on file for 128428 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!

Keywords: Divisors of 128428, math, Factors of 128428, curriculum, school, college, exams, university, Prime factorization of 128428, STEM, science, technology, engineering, physics, economics, calculator, one hundred twenty-eight thousand, four hundred twenty-eight.

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