A megahertz is one million (or 106) hertz.
See hertz, kilohertz (one thousand hertz), gigahertz[?] (109 hertz), terahertz[?] (1012 hertz), and petahertz[?] (1015 hertz).
... (3,704.7/mi²). There are 1,494 housing units at an average density of 427.3/km² (1,104.1/mi²). The racial makeup of the town is 40.00% White, ...