Il numero romano CDLXXXIX nel sistema decimale vale: 489.
CDLXXXIX in latino si scrive quadringenti octoginta novem,
mentre in italiano quattrocentottantanove.
CDLXX, CDLXXI, CDLXXII, CDLXXIII, CDLXXIV, CDLXXV, CDLXXVI, CDLXXVII, CDLXXVIII, CDLXXIX, CDLXXX, CDLXXXI, CDLXXXII, CDLXXXIII, CDLXXXIV, CDLXXXV, CDLXXXVI, CDLXXXVII, CDLXXXVIII, CDXC, CDXCI, CDXCII, CDXCIII, CDXCIV, CDXCV, CDXCVI, CDXCVII, CDXCVIII, CDXCIX, D, DI, DII, DIII, DIV, DV, DVI, DVII, DVIII