Some models of fat-tire bikes made by Mongoose are the Mongoose Mens Dolomite R4144 and the Mongoose Mens Brutus 26-inch wheel fat-tire bicycle.
The bike is extremely quick and really light.
Below these letters, you will see the serial number.
Some jurisdictions do not allow the exclusion of certain warranties, so the some of the foregoing exclusions may not apply to you.
No serious dents to speak of other than the one on the handle bars in the last photo.