Il numero romano MMMMDCCC nel sistema decimale vale: 4800.
MMMMDCCC in latino si scrive quattuor milia octingenti,
mentre in italiano quattromilaottocento.
MMMMDCCLXXXI, MMMMDCCLXXXII, MMMMDCCLXXXIII, MMMMDCCLXXXIV, MMMMDCCLXXXV, MMMMDCCLXXXVI, MMMMDCCLXXXVII, MMMMDCCLXXXVIII, MMMMDCCLXXXIX, MMMMDCCXC, MMMMDCCXCI, MMMMDCCXCII, MMMMDCCXCIII, MMMMDCCXCIV, MMMMDCCXCV, MMMMDCCXCVI, MMMMDCCXCVII, MMMMDCCXCVIII, MMMMDCCXCIX, MMMMDCCCI, MMMMDCCCII, MMMMDCCCIII, MMMMDCCCIV, MMMMDCCCV, MMMMDCCCVI, MMMMDCCCVII, MMMMDCCCVIII, MMMMDCCCIX, MMMMDCCCX, MMMMDCCCXI, MMMMDCCCXII, MMMMDCCCXIII, MMMMDCCCXIV, MMMMDCCCXV, MMMMDCCCXVI, MMMMDCCCXVII, MMMMDCCCXVIII, MMMMDCCCXIX