Il numero romano DCCCLXXXIX nel sistema decimale vale: 889.
DCCCLXXXIX in latino si scrive octingenti octoginta novem,
mentre in italiano ottocentottantanove.
DCCCLXX, DCCCLXXI, DCCCLXXII, DCCCLXXIII, DCCCLXXIV, DCCCLXXV, DCCCLXXVI, DCCCLXXVII, DCCCLXXVIII, DCCCLXXIX, DCCCLXXX, DCCCLXXXI, DCCCLXXXII, DCCCLXXXIII, DCCCLXXXIV, DCCCLXXXV, DCCCLXXXVI, DCCCLXXXVII, DCCCLXXXVIII, DCCCXC, DCCCXCI, DCCCXCII, DCCCXCIII, DCCCXCIV, DCCCXCV, DCCCXCVI, DCCCXCVII, DCCCXCVIII, DCCCXCIX, CM, CMI, CMII, CMIII, CMIV, CMV, CMVI, CMVII, CMVIII