The Natural Number 40

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Properties of the Number 40

  • Because 40 is divisible by 2 ...
    • 40 is an even number
    • 40 has parity 0
    • 40 is not an odd number
  • Because 40 can be factored as 2 x 20 ...
    • 40 is a composite number
    • 40 is not a prime number

Alternative Representations of the Number 40

  • Base 2 (binary): 101000
  • Base 8 (octal): 50
  • Base 16 (hexadecimal): 28
  • Roman numeral: XL
  • Words: forty

Divisors of the Number 40

  • 40 has 8 positive divisors: 1, 2, 4, 5, 8, 10, 20, 40
    • The sum of the positive divisors is 90
  • 40 has 7 proper divisors: 1, 2, 4, 5, 8, 10, 20
    • The sum of the proper divisors is 50
  • 40 is not a deficient number
  • 40 is not a perfect number
  • 40 is an abundant number since the sum of the proper divisors is greater than 40

More Properties of the Number 40

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

4:20 am, Wednesday, May 24, 2017 (UTC; +0000)
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