442

Number
$442$ (four hundred and forty-two) is:


 * $2 \times 13 \times 17$


 * The $17$th second pentagonal number after $2$, $7$, $15$, $26$, $40$, $57$, $77$, $100$, $126$, $155$, $187$, $222$, $260$, $301$, $345$, $392$:
 * $442 = \dfrac {17 \left({3 \times 17 + 1}\right)} 2$