456

Number
$456$ (four hundred and fifty-six) is:


 * $2^3 \times 3 \times 19$


 * The $8$th heptagonal pyramidal number after $1$, $8$, $26$, $60$, $115$, $196$, $308$:
 * $456 = 1 + 7 + 18 + 34 + 55 + 81 + 112 + 148 = \dfrac {8 \paren {8 + 1} \paren {5 \times 8 + 2} } 6$