Il numero romano MMCLXXVIII nel sistema decimale vale: 2178.
MMCLXXVIII in latino si scrive duo milia centum septuaginta octo,
mentre in italiano duemilacentosettantotto.
MMCLIX, MMCLX, MMCLXI, MMCLXII, MMCLXIII, MMCLXIV, MMCLXV, MMCLXVI, MMCLXVII, MMCLXVIII, MMCLXIX, MMCLXX, MMCLXXI, MMCLXXII, MMCLXXIII, MMCLXXIV, MMCLXXV, MMCLXXVI, MMCLXXVII, MMCLXXIX, MMCLXXX, MMCLXXXI, MMCLXXXII, MMCLXXXIII, MMCLXXXIV, MMCLXXXV, MMCLXXXVI, MMCLXXXVII, MMCLXXXVIII, MMCLXXXIX, MMCXC, MMCXCI, MMCXCII, MMCXCIII, MMCXCIV, MMCXCV, MMCXCVI, MMCXCVII