Il numero romano MMMDCCCLXXX nel sistema decimale vale: 3880.
MMMDCCCLXXX in latino si scrive tria milia octingenti octoginta,
mentre in italiano tremilaottocentottanta.
MMMDCCCLXI, MMMDCCCLXII, MMMDCCCLXIII, MMMDCCCLXIV, MMMDCCCLXV, MMMDCCCLXVI, MMMDCCCLXVII, MMMDCCCLXVIII, MMMDCCCLXIX, MMMDCCCLXX, MMMDCCCLXXI, MMMDCCCLXXII, MMMDCCCLXXIII, MMMDCCCLXXIV, MMMDCCCLXXV, MMMDCCCLXXVI, MMMDCCCLXXVII, MMMDCCCLXXVIII, MMMDCCCLXXIX, MMMDCCCLXXXI, MMMDCCCLXXXII, MMMDCCCLXXXIII, MMMDCCCLXXXIV, MMMDCCCLXXXV, MMMDCCCLXXXVI, MMMDCCCLXXXVII, MMMDCCCLXXXVIII, MMMDCCCLXXXIX, MMMDCCCXC, MMMDCCCXCI, MMMDCCCXCII, MMMDCCCXCIII, MMMDCCCXCIV, MMMDCCCXCV, MMMDCCCXCVI, MMMDCCCXCVII, MMMDCCCXCVIII, MMMDCCCXCIX