Il numero romano MCDXXX nel sistema decimale vale: 1430.
MCDXXX in latino si scrive mille quadringenti triginta,
mentre in italiano millequattrocentotrenta.
MCDXI, MCDXII, MCDXIII, MCDXIV, MCDXV, MCDXVI, MCDXVII, MCDXVIII, MCDXIX, MCDXX, MCDXXI, MCDXXII, MCDXXIII, MCDXXIV, MCDXXV, MCDXXVI, MCDXXVII, MCDXXVIII, MCDXXIX, MCDXXXI, MCDXXXII, MCDXXXIII, MCDXXXIV, MCDXXXV, MCDXXXVI, MCDXXXVII, MCDXXXVIII, MCDXXXIX, MCDXL, MCDXLI, MCDXLII, MCDXLIII, MCDXLIV, MCDXLV, MCDXLVI, MCDXLVII, MCDXLVIII, MCDXLIX