Looks like the Mi-28 carries 2 on each pylon in the places it is visible in the photos/vids here:
https://www.thedrive.com/the-war-zon...ile-in-ukraine
"The helicopter carries two LMUR missiles on a twin APU-L rail on the outer pylon under the right wing; the other pylon is empty. It’s not possible to see exactly what’s hanging under the left wing, except for an extra fuel tank. In another video, published a few days earlier by the Ugolok_Sitha channel, a Mi-28NM is seen carrying one LMUR missile under its right wing (on an APU-L twin rail), with a B8V-20 rocket launcher and an additional fuel tank under the left wing."
so 2 for every 6 or 8 Vikhr / Ataka