Il numero romano MMMDCXX nel sistema decimale vale: 3620.
MMMDCXX in latino si scrive tria milia sescenti viginti,
mentre in italiano tremilaseicentoventi.
MMMDCI, MMMDCII, MMMDCIII, MMMDCIV, MMMDCV, MMMDCVI, MMMDCVII, MMMDCVIII, MMMDCIX, MMMDCX, MMMDCXI, MMMDCXII, MMMDCXIII, MMMDCXIV, MMMDCXV, MMMDCXVI, MMMDCXVII, MMMDCXVIII, MMMDCXIX, MMMDCXXI, MMMDCXXII, MMMDCXXIII, MMMDCXXIV, MMMDCXXV, MMMDCXXVI, MMMDCXXVII, MMMDCXXVIII, MMMDCXXIX, MMMDCXXX, MMMDCXXXI, MMMDCXXXII, MMMDCXXXIII, MMMDCXXXIV, MMMDCXXXV, MMMDCXXXVI, MMMDCXXXVII, MMMDCXXXVIII, MMMDCXXXIX