Consider the reaction

$N_{2}O_{4}\left( g\right) \rightleftharpoons 2NO_{2}\left( g\right)$

The temperature at which K_C = 20.4 and K_P = 600.1, is ____________ K. (Round off to the Nearest Integer). [Assume all gases are ideal and R = 0.0831 L bar K^$-$1 mol^$-$1]