# Is 28 Prime Number or Composite Number

Created by: Team Maths - Examples.com, Last Updated: May 7, 2024

## Is 28 a Prime Number?

### No – 28 is not a prime number.

Why No: 28 is not a prime number because it does not fulfil the prime criteria of having exactly two distinct positive divisors. Instead, it has six: 1, 2, 4, 7, 14, and itself (28). See Prime number checker

## Is 28 a Composite Number?

### YES – 28 is a Composite Number

Why Yes: This is correct; 28 is indeed a composite number because it has more than two distinct positive divisors: 1, 2, 4, 7, 14, and itself (28).

## Problem Statements

Is 28 a prime number? No
Is 28 a composite number? Yes
Is 28 a perfect square? No
Factors of 28 1, 2, 4, 7, 14, 28
Multiples of 28 28, 56, 84, 112, 140, 168, 196, 224, 252, 280
Cube Root of 28 3.04
Square of 28 784
Square Root of 28 5.29
Is 28 a Perfect Square? No
Is 28 a Perfect Cube? No
Is 28 an Irrational number? No
Is 28 a Rational number? Yes
Is 28 a Real number? Yes
Is 28 an Integer? Yes
Is 28 a Natural number? Yes
Is 28 a Whole number? Yes
Is 28 an Even or odd number? Yes (28 is an even number)
Is 28 an Ordinal number? Yes
Is 28 a Complex number? Yes (as all real numbers are also complex numbers)

## What are the factors of 28?

The factors of 28 are 1, 2, 4, 7, 14, and 28. Since 28 is not a square number, its factors include 1, 2, 4, 7, 14, and itself. There are no more factors of 28.

## What Kind of Number is 28?

• The factors of 28 are 1, 2, 4, 7, 14, and 28.
• 28 is a composite number.
• 28 is not one of the even prime numbers, but it is an even number.
• 28 is considered a significant number in various contexts, including its role as a perfect number.
• 28 is a natural number.
• 28 is a positive integer.
• 28 is a composite number.
• 28 is an even number.
• 28 is a rational number.
• 28 is a whole number.

28 is recognized as a composite number because it has more than two divisors, which distinguishes it from prime numbers that are only divisible by 1 and themselves. The number 28, being a perfect number (the sum of its divisors excluding itself equals the number), holds a unique place in mathematics and various cultural contexts, often associated with harmony and completeness.

## FAQS

What is the first 28 prime number?

The first 28 prime numbers form a sequence starting with 2 and including 109 as the 28th prime, showcasing the unique and indivisible nature of these numbers.

Is 28 a perfect number?

Yes, 28 is a perfect number because the sum of its divisors (1, 2, 4, 7, 14) excluding itself equals 28, demonstrating a unique mathematical harmony.

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