Il numero romano MMMMLXXVIII nel sistema decimale vale: 4078.
MMMMLXXVIII in latino si scrive quattuor milia septuaginta octo,
mentre in italiano quattromilasettantotto.
MMMMLIX, MMMMLX, MMMMLXI, MMMMLXII, MMMMLXIII, MMMMLXIV, MMMMLXV, MMMMLXVI, MMMMLXVII, MMMMLXVIII, MMMMLXIX, MMMMLXX, MMMMLXXI, MMMMLXXII, MMMMLXXIII, MMMMLXXIV, MMMMLXXV, MMMMLXXVI, MMMMLXXVII, MMMMLXXIX, MMMMLXXX, MMMMLXXXI, MMMMLXXXII, MMMMLXXXIII, MMMMLXXXIV, MMMMLXXXV, MMMMLXXXVI, MMMMLXXXVII, MMMMLXXXVIII, MMMMLXXXIX, MMMMXC, MMMMXCI, MMMMXCII, MMMMXCIII, MMMMXCIV, MMMMXCV, MMMMXCVI, MMMMXCVII