Il numero romano CDXXXIX nel sistema decimale vale: 439.
CDXXXIX in latino si scrive quadringenti triginta novem,
mentre in italiano quattrocentotrentanove.
CDXX, CDXXI, CDXXII, CDXXIII, CDXXIV, CDXXV, CDXXVI, CDXXVII, CDXXVIII, CDXXIX, CDXXX, CDXXXI, CDXXXII, CDXXXIII, CDXXXIV, CDXXXV, CDXXXVI, CDXXXVII, CDXXXVIII, CDXL, CDXLI, CDXLII, CDXLIII, CDXLIV, CDXLV, CDXLVI, CDXLVII, CDXLVIII, CDXLIX, CDL, CDLI, CDLII, CDLIII, CDLIV, CDLV, CDLVI, CDLVII, CDLVIII