Il numero romano MMMCDXXX nel sistema decimale vale: 3430.
MMMCDXXX in latino si scrive tria milia quadringenti triginta,
mentre in italiano tremilaquattrocentotrenta.
MMMCDXI, MMMCDXII, MMMCDXIII, MMMCDXIV, MMMCDXV, MMMCDXVI, MMMCDXVII, MMMCDXVIII, MMMCDXIX, MMMCDXX, MMMCDXXI, MMMCDXXII, MMMCDXXIII, MMMCDXXIV, MMMCDXXV, MMMCDXXVI, MMMCDXXVII, MMMCDXXVIII, MMMCDXXIX, MMMCDXXXI, MMMCDXXXII, MMMCDXXXIII, MMMCDXXXIV, MMMCDXXXV, MMMCDXXXVI, MMMCDXXXVII, MMMCDXXXVIII, MMMCDXXXIX, MMMCDXL, MMMCDXLI, MMMCDXLII, MMMCDXLIII, MMMCDXLIV, MMMCDXLV, MMMCDXLVI, MMMCDXLVII, MMMCDXLVIII, MMMCDXLIX