Il numero romano MMMMDCXC nel sistema decimale vale: 4690.
MMMMDCXC in latino si scrive quattuor milia sescenti nonaginta,
mentre in italiano quattromilaseicentonovanta.
MMMMDCLXXI, MMMMDCLXXII, MMMMDCLXXIII, MMMMDCLXXIV, MMMMDCLXXV, MMMMDCLXXVI, MMMMDCLXXVII, MMMMDCLXXVIII, MMMMDCLXXIX, MMMMDCLXXX, MMMMDCLXXXI, MMMMDCLXXXII, MMMMDCLXXXIII, MMMMDCLXXXIV, MMMMDCLXXXV, MMMMDCLXXXVI, MMMMDCLXXXVII, MMMMDCLXXXVIII, MMMMDCLXXXIX, MMMMDCXCI, MMMMDCXCII, MMMMDCXCIII, MMMMDCXCIV, MMMMDCXCV, MMMMDCXCVI, MMMMDCXCVII, MMMMDCXCVIII, MMMMDCXCIX, MMMMDCC, MMMMDCCI, MMMMDCCII, MMMMDCCIII, MMMMDCCIV, MMMMDCCV, MMMMDCCVI, MMMMDCCVII, MMMMDCCVIII, MMMMDCCIX