# Divisors of the Positive Integer 28

1, 2, 4, 7, 14, 28## Sum of all the Divisors of 28, including itself

56## Sum of the Proper Divisors of 28

28## Properties of the number 28

The integer 28 is an**even**number.

The integer 28 is a

**Composite**number.

28

*equals*28, so it is a

**Perfect**number.

## The number 28 as a Roman Numeral

**XXVIII**

## The number 28 in various Numeral Systems

Base |
Representation |
---|---|

2: | 11100 |

3: | 1001 |

4: | 130 |

5: | 103 |

6: | 44 |

7: | 40 |

8: | 34 |

9: | 31 |

10: | 28 |

11: | 26 |

12: | 24 |

13: | 22 |

14: | 20 |

15: | 1D |

16: | 1C |

17: | 1B |

18: | 1A |

19: | 19 |

20: | 18 |

21: | 17 |

22: | 16 |

23: | 15 |

24: | 14 |

25: | 13 |

26: | 12 |

27: | 11 |

28: | 10 |

29: | S |

30: | S |

31: | S |

32: | S |

33: | S |

34: | S |

35: | S |

36: | S |