# Q: Is 28 A Prime Or Composite Number, Is 28 A Prime Or Composite Number

Is 28 a prime number? How do you know that 28 is prime or composite? Let us first understand what makes a number 'prime'. If a number has only 2 factors (1 and the number itself), then it is a prime number. If the number has more than 2 factors, then it is composite. Now, what do you think of 28? Is 28 a prime number? * “No, 28 is not a prime number.”* Since 28 has more than 2 factors i.e. 1, 2, 4, 7, 14, 28, it is a composite number. Let's study this in detail.

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**Is 28 a prime number? –** No**Is 28 a composite number? –** Yes**Factors of 28 –** 1, 2, 4, 7, 14, 28**Prime Factors of 28 –** 2, 7**Is 28 a perfect square? –** No

## Is 28 a Prime Number?

No, 28 is not a prime number. The number 28 is divisible by 1, 2, 4, 7, 14, 28. For a number to be classified as a prime number, it should have exactly two factors. Since 28 has more than two factors, i.e. 1, 2, 4, 7, 14, 28, it is not a prime number.

## Why is 28 not a Prime Number?

To understand whether 28 is composite or prime, it is important to find its factors.

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**Factors of 28:** 1, 2, 4, 7, 14, 28

Since 28 has more than 2 factors, we can say that 28 is not a prime number.

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## Is 28 a Composite Number?

Yes, since 28 has more than two factors i.e. 1, 2, 4, 7, 14, 28. In other words, 28 is a composite number because 28 has more than 2 factors.

**Problem Statements: **

Is 28 a Prime Number? | No |

Is 28 a Composite Number? | Yes |

Is 28 a Perfect Cube? | No |

Multiples of 28 | 28, 56, 84, 112, 140, 168, 196, 224, 252, 280 |

Is 28 an Odd Number? | No |

Square Root of 28 | 5.291503 |

Square of 28 | 784 |

Is 28 an Even Number? | Yes |

Cube Root of 28 | 3.036586 |

Is 28 a Perfect Square? | No |

**Fun Facts: **

Numbers X and Y are said to be coprime if they have only one common factor that is 1.A pair of prime numbers X and Y are said to be twin prime numbers if the absolute difference between them is 2. Example – (311, 313) are twin prime numbers.A palindrome prime is a prime number that when read in reverse order results in the same number. Examples – 10601, 11311, 12421

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