It was modeled in blender and exported to a variety of formats. The blender version has a subsurf modifier that allows you to set the level of detail as high as you like (from its base 2,158 polygons up to millions). For the other formats I've included a high res smoothed version at 33,528 polygons (the main downloads) and the low poly base mesh with 2,158 polygons (these are in the 'Accompanying Product Files').
Materials are included in the .blend (though the image shown on the screen is not included).
-The 'Other' in the file types is the .mtl to go with the .obj