# Compare 28 vs 29

Property | 28 | 29 |
---|---|---|

Type | composite number | prime |

Unique factors | 2 | 1 |

Total factors | 3 | 1 |

Prime factorization | 2^{2} × 7^{1} | 29^{1} |

Prime factorization | 2 × 2 × 7 | 29 |

Divisors count | 6 | 2 |

Divisors | 1, 2, 4, 7, 14, 28 | 1, 29 |

Number of properties | 0 | 14 |

Additive primes | 7th | |

Chen primes | 10th | |

Good primes | 4th | |

Long primes | 5th | |

Lucas primes | 5th | |

Primes | 10th | |

Pythagorean primes | 4th | |

Right-truncatable primes | 6th | |

Sexy primes (2nd member) | 6th | |

Sexy prime quadrupletss (4th member) | 2nd | |

Sexy prime triplets (3rd member) | 4th | |

Solinas primes | 9th | |

Sophie germain primes | 6th | |

Twin primes (1st member) | 5th | |

Roman numberals | XXVIII | XXIX |

Base 2 | 11100_{2} | 11101_{2} |

Base 3 | 1001_{3} | 1002_{3} |

Base 4 | 130_{4} | 131_{4} |

Base 5 | 103_{5} | 104_{5} |

Base 6 | 44_{6} | 45_{6} |

Base 7 | 40_{7} | 41_{7} |

Base 8 | 34_{8} | 35_{8} |

Base 9 | 31_{9} | 32_{9} |

Base 10 | 28_{10} | 29_{10} |

Base 11 | 26_{11} | 27_{11} |

Base 12 | 24_{12} | 25_{12} |

Base 13 | 22_{13} | 23_{13} |

Base 14 | 20_{14} | 21_{14} |

Base 15 | 1d_{15} | 1e_{15} |

Base 16 | 1c_{16} | 1d_{16} |