2. Arrange the digits $1,2,3,4,5,6,7,8,9$ in some order to form a nine-digit number abodefghi, and let
$$
A=\overline{a b c}+\overline{b c d}+\overline{c d e}+\overline{d e f}+\overline{e f g}+\overline{f g h}+\overline{g h i} .
$$

Then the maximum possible value of $A$ is
2.4648 .
$A=111(c+d+e+f+g)+110 b+100 a+11 h+i$,
then when $c+d+e+f+g=9+8+7+6+5=35, b=4$, $a=3, h=2, i=1$, the maximum value of $A$ is 4648.