987,654,321

Number
$987 \, 654 \, 321$ is:


 * $3^2 \times 17^2 \times 379 \, 721$


 * Remains penholodigital when multiplied by $2$, $4$, $5$, $7$ and $8$

Also see

 * Penholodigital Properties of 987,654,321