For the orbital with wave funcion ${\mathrm{\psi }}_{3,2,1}$   the sum of angular momentum, spherical nodes and angular nodes is

${\mathrm{\psi }}_{(\mathrm{n},\mathrm{l},\mathrm{m})}={\mathrm{\psi }}_{(3,2,1)}$

orbital angular momentum $\text{=}\sqrt{\mathrm{l}(\mathrm{l}+1)}\frac{\mathrm{h}}{2\mathrm{\pi }}=\sqrt{6}\frac{\mathrm{h}}{2\mathrm{\pi }}$

Radial nodes (Spherical nodes) = n-l-1=3-2-1=0

Angular nodes = l=2

Sum of orbital angular momentum, spherical nodes and angular nodes

$=\sqrt{6}\frac{\mathrm{h}}{2\mathrm{\pi }}+0+2$

$=\sqrt{6}\frac{\mathrm{h}}{2\mathrm{\pi }}+2$

$=\frac{\sqrt{6}\mathrm{h}+4\mathrm{\pi }}{2\mathrm{\pi }}$