# 228

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## Number

$228$ (two hundred and twenty-eight) is:

$2^2 \times 3 \times 19$

The $3$rd element of the $2$nd set of $4$ positive integers which form an arithmetic progression which all have the same Euler $\phi$ value:
$\phi \left({216}\right) = \phi \left({222}\right) = \phi \left({228}\right) = \phi \left({234}\right) = 72$

The $14$th of the $17$ positive integers for which the value of the Euler $\phi$ function is $72$:
$73$, $91$, $95$, $111$, $117$, $135$, $146$, $148$, $152$, $182$, $190$, $216$, $222$, $228$, $234$, $252$, $270$

The $2$nd integer after $3$ whose square is the sum of $2$ coprime cubes:
$228^2 = 37^3 + 11^3$