Solid State: JEE Main 2020 Chemistry question

An element with molar mass 2.7 $\times$ 10⁻² kg mol⁻¹ forms a cubic unit cell with edge length 405 pm. If its density is 2.7 $\times$ 10³ kg m⁻³, the radius of the element is approximately ______ $\times$ 10⁻¹² m (to the nearest integer).