Hippos typically have a total of 36 to 40 teeth. This includes large canines and incisors that are adapted for their herbivorous diet.
To elaborate, hippos have four large canine teeth that can grow quite long and are used for fighting and displaying dominance among other hippos. The rest of their teeth are used for grinding down tough vegetation like grass. Interestingly, their teeth continue to grow throughout their lives, and hippos regularly wear them down through their feeding habits.