Il numero romano MMMDCCCXL nel sistema decimale vale: 3840.
MMMDCCCXL in latino si scrive tria milia octingenti quadraginta,
mentre in italiano tremilaottocentoquaranta.
MMMDCCCXXI, MMMDCCCXXII, MMMDCCCXXIII, MMMDCCCXXIV, MMMDCCCXXV, MMMDCCCXXVI, MMMDCCCXXVII, MMMDCCCXXVIII, MMMDCCCXXIX, MMMDCCCXXX, MMMDCCCXXXI, MMMDCCCXXXII, MMMDCCCXXXIII, MMMDCCCXXXIV, MMMDCCCXXXV, MMMDCCCXXXVI, MMMDCCCXXXVII, MMMDCCCXXXVIII, MMMDCCCXXXIX, MMMDCCCXLI, MMMDCCCXLII, MMMDCCCXLIII, MMMDCCCXLIV, MMMDCCCXLV, MMMDCCCXLVI, MMMDCCCXLVII, MMMDCCCXLVIII, MMMDCCCXLIX, MMMDCCCL, MMMDCCCLI, MMMDCCCLII, MMMDCCCLIII, MMMDCCCLIV, MMMDCCCLV, MMMDCCCLVI, MMMDCCCLVII, MMMDCCCLVIII, MMMDCCCLIX