Il numero romano MCCLXXXIV nel sistema decimale vale: 1284.
MCCLXXXIV in latino si scrive mille ducenti octoginta quattuor,
mentre in italiano milleduecentottantaquattro.
MCCLXV, MCCLXVI, MCCLXVII, MCCLXVIII, MCCLXIX, MCCLXX, MCCLXXI, MCCLXXII, MCCLXXIII, MCCLXXIV, MCCLXXV, MCCLXXVI, MCCLXXVII, MCCLXXVIII, MCCLXXIX, MCCLXXX, MCCLXXXI, MCCLXXXII, MCCLXXXIII, MCCLXXXV, MCCLXXXVI, MCCLXXXVII, MCCLXXXVIII, MCCLXXXIX, MCCXC, MCCXCI, MCCXCII, MCCXCIII, MCCXCIV, MCCXCV, MCCXCVI, MCCXCVII, MCCXCVIII, MCCXCIX, MCCC, MCCCI, MCCCII, MCCCIII