306

Number
$306$ (three hundred and six) is:


 * $2 \times 3^2 \times 17$


 * The $24$th untouchable number after $2$, $5$, $52$, $88$, $96$, $120$, $124$, $\ldots$, $262$, $268$, $276$, $290$, $292$, $304$