The Natural Number 28

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Properties of the Number 28

  • Because 28 is divisible by 2 ...
    • 28 is an even number
    • 28 has parity 0
    • 28 is not an odd number
  • Because 28 can be factored as 2 x 14 ...
    • 28 is a composite number
    • 28 is not a prime number

Alternative Representations of the Number 28

  • Base 2 (binary): 11100
  • Base 8 (octal): 34
  • Base 16 (hexadecimal): 1C
  • Roman numeral: XXVIII
  • Words: twenty-eight

Divisors of the Number 28

  • 28 has 6 positive divisors: 1, 2, 4, 7, 14, 28
    • The sum of the positive divisors is 56
  • 28 has 5 proper divisors: 1, 2, 4, 7, 14
    • The sum of the proper divisors is 28
  • 28 is not a deficient number
  • 28 is a perfect number since the sum of the proper divisors equals 28
  • 28 is not an abundant number

More Properties of the Number 28

  • 28 is not a square number
  • 28 is not a cube number
  • 28 is not a palindromic number
  • 28 is not a Fibonacci number
  • 28 is not a Lucas number

9:44 am, Saturday, March 25, 2017 (UTC; +0000)
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