# Learn Perfect Number | Perfect Square | Perfect Cube Number # What do you mean by Perfect Number, Perfect Square, Perfect Cube Number?

## Define Perfect Number

A perfect number is defined to be positive integer which is equal to the sum of its proper divisors..

For example: The smallest perfect number is 6 = 1 + 2 + 3.

Other perfect numbers are

28 = 1 + 2 + 4 + 7 + 14.

496 = 1 + 2 + 4 + 8 + 16 + 31 + 62 + 124 + 248

8128 = 1 + 2 + 4 + 8 + 16 + 32 + 64+ 127 + 254+ 508 + 1016 + 2032 + 4064.

## Define Perfect Square Number or Square Number

Perfect square is an integer that is the square of an integer.

12 = 1

22 = 4

32 = 9

42 = 16

52 = 25

62 = 36

72 = 49

82 = 64

92 = 81

102 = 100

## Define Perfect Cube Number or Cube Number

Perfect Cube is an integer that is the sum of an 3 equal integers.

### Example

13 = 1

23 = 8

33 = 27

43 = 64

53 = 125

63 = 216

73 = 343

83 = 512

93 = 729

103 = 1000 # Related Number Types

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