Il numero romano MMDCLXXVIII nel sistema decimale vale: 2678.
MMDCLXXVIII in latino si scrive duo milia sescenti septuaginta octo,
mentre in italiano duemilaseicentosettantotto.
MMDCLIX, MMDCLX, MMDCLXI, MMDCLXII, MMDCLXIII, MMDCLXIV, MMDCLXV, MMDCLXVI, MMDCLXVII, MMDCLXVIII, MMDCLXIX, MMDCLXX, MMDCLXXI, MMDCLXXII, MMDCLXXIII, MMDCLXXIV, MMDCLXXV, MMDCLXXVI, MMDCLXXVII, MMDCLXXIX, MMDCLXXX, MMDCLXXXI, MMDCLXXXII, MMDCLXXXIII, MMDCLXXXIV, MMDCLXXXV, MMDCLXXXVI, MMDCLXXXVII, MMDCLXXXVIII, MMDCLXXXIX, MMDCXC, MMDCXCI, MMDCXCII, MMDCXCIII, MMDCXCIV, MMDCXCV, MMDCXCVI, MMDCXCVII