436

Number
$436$ (four hundred and thirty-six) is:


 * $2^2 \times 109$


 * The $43$rd noncototient after $10$, $26$, $34$, $50$, $\ldots$, $344$, $346$, $362$, $366$, $372$, $386$, $394$, $404$, $412$:
 * $\nexists m \in \Z_{>0}: m - \phi \left({m}\right) = 436$
 * where $\phi \left({m}\right)$ denotes the Euler $\phi$ function