I have a T3200M router and I have yet to see the uptime go over 24hrs. It always restarts, never at the same time of the day and sometimes will restart up to 5 times a day. I'm starting to get really tired of having this issue as my friend has the same T3200M and has over 200 days of uptime on his.
Scrolled down a bit, seen a post that had the same issue as me. I have google homes, smart lights, WiFi Booster, etc. (22 devices connected in total, maybe 4 of them are wired, can't entirely remember.) I am going to try to remove my smart lights and see if that solves anything. I also made sure I didn't have a bad power supply and/or bad power. Hoping for the best, I am tired of this happening all the time.