Congrats for finishing your draft. Time to celebrate.
You've received great advice so far! My polished MG's are on the shorter end, around 35,000 words (a couple dipped a bit under--but none are below 32,000).
The good news is you said you just finished a draft. I tend to write bloated first drafts during NaNoWriMo--and then put my manuscript on a serious diet. There's a good chance you'll find lots of areas to flesh out during revisions. Hopefully, you have an awesome critique group or critique partners.
I'm a huge fan of shorter chapters in my MGs. I think my longest chapter is 6 - 7 pages. Most are in the 3 - 5 page range. Think about what everyone said about a natural break and ending with a cliffhanger whenever possible. Also keep in mind your intended audience.
You can check word counts for books similar to yours on this site:
https://www.arbookfind.com/default.aspx