Assuming the given number is in radians then multiply by 180/pi to turn it into degrees.
$${\frac{{\mathtt{0.488}}{\mathtt{\,\times\,}}{\mathtt{180}}}{{\mathtt{\pi}}}} = {\mathtt{27.960\: \!340\: \!402\: \!384\: \!172\: \!6}}$$
or 28° to the nearest degree
.
