340

Number
$340$ (three hundred and forty) is:


 * $2^2 \times 5 \times 17$


 * The $33$rd noncototient after $10, 26, 34, 50, \ldots, 244, 260, 266, 268, 274, 290, 292, 298, 310, 326$:
 * $\nexists m \in \Z_{>0}: m - \phi \left({m}\right) = 340$
 * where $\phi \left({m}\right)$ denotes the Euler $\phi$ function