For some a, b, c \in \mathbb{N}, let the polynomial
p(x)=x^{5}-252 x^{4}+a x^{3}-b x^{2}+c x-62604360
have five distinct roots that are positive integers. Four of these are 2-digit numbers, while the last one is single-digit. Concatenate all five roots in decreasing order, and write down the result.