Il numero romano MMCDLXXVIII nel sistema decimale vale: 2478.
MMCDLXXVIII in latino si scrive duo milia quadringenti septuaginta octo,
mentre in italiano duemilaquattrocentosettantotto.
MMCDLIX, MMCDLX, MMCDLXI, MMCDLXII, MMCDLXIII, MMCDLXIV, MMCDLXV, MMCDLXVI, MMCDLXVII, MMCDLXVIII, MMCDLXIX, MMCDLXX, MMCDLXXI, MMCDLXXII, MMCDLXXIII, MMCDLXXIV, MMCDLXXV, MMCDLXXVI, MMCDLXXVII, MMCDLXXIX, MMCDLXXX, MMCDLXXXI, MMCDLXXXII, MMCDLXXXIII, MMCDLXXXIV, MMCDLXXXV, MMCDLXXXVI, MMCDLXXXVII, MMCDLXXXVIII, MMCDLXXXIX, MMCDXC, MMCDXCI, MMCDXCII, MMCDXCIII, MMCDXCIV, MMCDXCV, MMCDXCVI, MMCDXCVII