Il numero romano MMMDCCCXC nel sistema decimale vale: 3890.
MMMDCCCXC in latino si scrive tria milia octingenti nonaginta,
mentre in italiano tremilaottocentonovanta.
MMMDCCCLXXI, MMMDCCCLXXII, MMMDCCCLXXIII, MMMDCCCLXXIV, MMMDCCCLXXV, MMMDCCCLXXVI, MMMDCCCLXXVII, MMMDCCCLXXVIII, MMMDCCCLXXIX, MMMDCCCLXXX, MMMDCCCLXXXI, MMMDCCCLXXXII, MMMDCCCLXXXIII, MMMDCCCLXXXIV, MMMDCCCLXXXV, MMMDCCCLXXXVI, MMMDCCCLXXXVII, MMMDCCCLXXXVIII, MMMDCCCLXXXIX, MMMDCCCXCI, MMMDCCCXCII, MMMDCCCXCIII, MMMDCCCXCIV, MMMDCCCXCV, MMMDCCCXCVI, MMMDCCCXCVII, MMMDCCCXCVIII, MMMDCCCXCIX, MMMCM, MMMCMI, MMMCMII, MMMCMIII, MMMCMIV, MMMCMV, MMMCMVI, MMMCMVII, MMMCMVIII, MMMCMIX