Il numero romano MDCCLXXVIII nel sistema decimale vale: 1778.
MDCCLXXVIII in latino si scrive mille septingenti septuaginta octo,
mentre in italiano millesettecentosettantotto.
MDCCLIX, MDCCLX, MDCCLXI, MDCCLXII, MDCCLXIII, MDCCLXIV, MDCCLXV, MDCCLXVI, MDCCLXVII, MDCCLXVIII, MDCCLXIX, MDCCLXX, MDCCLXXI, MDCCLXXII, MDCCLXXIII, MDCCLXXIV, MDCCLXXV, MDCCLXXVI, MDCCLXXVII, MDCCLXXIX, MDCCLXXX, MDCCLXXXI, MDCCLXXXII, MDCCLXXXIII, MDCCLXXXIV, MDCCLXXXV, MDCCLXXXVI, MDCCLXXXVII, MDCCLXXXVIII, MDCCLXXXIX, MDCCXC, MDCCXCI, MDCCXCII, MDCCXCIII, MDCCXCIV, MDCCXCV, MDCCXCVI, MDCCXCVII