188

Number
$188$ (one hundred and eighty-eight) is:


 * $2^2 \times 47$


 * The $10$th untouchable number after $2, 5, 52, 88, 96, 120, 124, 146, 162$.


 * The $27$th nontotient:
 * $\nexists m \in \Z_{>0}: \phi \left({m}\right) = 188$
 * where $\phi \left({m}\right)$ denotes the Euler $\phi$ function