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