# Compare 28 vs 61

Property | 28 | 61 |
---|---|---|

Type | composite number | prime |

Unique factors | 2 | 1 |

Total factors | 3 | 1 |

Prime factorization | 2^{2} × 7^{1} | 61^{1} |

Prime factorization | 2 × 2 × 7 | 61 |

Divisors count | 6 | 2 |

Divisors | 1, 2, 4, 7, 14, 28 | 1, 61 |

Number of properties | 0 | 12 |

Additive primes | 11th | |

Centered decagonal primes | 3rd | |

Centered square primes | 4th | |

Cuban primes 1 | 4th | |

Long primes | 8th | |

Primes | 18th | |

Pythagorean primes | 8th | |

Sexy primes (1st member) | 12th | |

Sexy prime quadrupletss (1st member) | 4th | |

Sexy prime triplets (1st member) | 8th | |

Solinas primes | 15th | |

Twin primes (2nd member) | 7th | |

Roman numberals | XXVIII | LXI |

Base 2 | 11100_{2} | 111101_{2} |

Base 3 | 1001_{3} | 2021_{3} |

Base 4 | 130_{4} | 331_{4} |

Base 5 | 103_{5} | 221_{5} |

Base 6 | 44_{6} | 141_{6} |

Base 7 | 40_{7} | 115_{7} |

Base 8 | 34_{8} | 75_{8} |

Base 9 | 31_{9} | 67_{9} |

Base 10 | 28_{10} | 61_{10} |

Base 11 | 26_{11} | 56_{11} |

Base 12 | 24_{12} | 51_{12} |

Base 13 | 22_{13} | 49_{13} |

Base 14 | 20_{14} | 45_{14} |

Base 15 | 1d_{15} | 41_{15} |

Base 16 | 1c_{16} | 3d_{16} |