Il numero romano MMMDCXC nel sistema decimale vale: 3690.
MMMDCXC in latino si scrive tria milia sescenti nonaginta,
mentre in italiano tremilaseicentonovanta.
MMMDCLXXI, MMMDCLXXII, MMMDCLXXIII, MMMDCLXXIV, MMMDCLXXV, MMMDCLXXVI, MMMDCLXXVII, MMMDCLXXVIII, MMMDCLXXIX, MMMDCLXXX, MMMDCLXXXI, MMMDCLXXXII, MMMDCLXXXIII, MMMDCLXXXIV, MMMDCLXXXV, MMMDCLXXXVI, MMMDCLXXXVII, MMMDCLXXXVIII, MMMDCLXXXIX, MMMDCXCI, MMMDCXCII, MMMDCXCIII, MMMDCXCIV, MMMDCXCV, MMMDCXCVI, MMMDCXCVII, MMMDCXCVIII, MMMDCXCIX, MMMDCC, MMMDCCI, MMMDCCII, MMMDCCIII, MMMDCCIV, MMMDCCV, MMMDCCVI, MMMDCCVII, MMMDCCVIII, MMMDCCIX