1634

Number
$1634$ (one thousand, six hundred and thirty-four) is:


 * $2 \times 19 \times 43$


 * The $14$th pluperfect digital invariant after $1$, $2$, $3$, $4$, $5$, $6$, $7$, $8$, $9$, $153$, $370$, $371$, $407$:
 * $1^4 + 6^4 + 3^4 + 4^4 = 1 + 1296 + 81 + 256 = 1634$