268

Previous  ... Next

Number

$268$ (two hundred and sixty-eight) is:

$2^2 \times 67$

The smallest positive integer which can be expressed as the sum of $2$ distinct lucky numbers in $16$ different ways

The $18$th untouchable number after $2$, $5$, $52$, $88$, $96$, $120$, $124$, $146$, $162$, $188$, $206$, $210$, $216$, $238$, $246$, $248$, $262$

The $26$th noncototient after $10$, $26$, $34$, $50$, $\ldots$, $206$, $218$, $222$, $232$, $244$, $260$, $266$:
$\nexists m \in \Z_{>0}: m - \map \phi m = 268$
where $\map \phi m$ denotes the Euler $\phi$ function