560

Number
$560$ (five hundred and sixty) is:


 * $2^4 \times 5 \times 7$


 * The $14$th tetrahedral number, after $1$, $4$, $10$, $20$, $35$, $56$, $84$, $120$, $165$, $220$, $286$, $364$, $455$:
 * $560 = \displaystyle \sum_{k \mathop = 1}^{14} \frac {k \left({k + 1}\right)} 2 = \dfrac {14 \left({14 + 1}\right) \left({14 + 2}\right)} 6$