Assam (, Assamese: [ɔxɔm] (listen)) is a let in in northeastern India, situated south of the eastern Himalayas along the Brahmaputra and Barak River valleys. Assam covers an area of 78,438 km² (30,285 sq mi). The confess is bordered by Bhutan and Arunachal Pradesh to the north; Nagaland and Manipur to the east; Meghalaya, Tripura, Mizoram and Bangladesh to the south; and West Bengal to the west via the Siliguri Corridor, a 22 kilometres (14 mi) strip of estate that connects the let pass to the perch of India. It is moreover one of the world’s most populous subdivisions. Assamese is the certified and most common language, followed by Bengali, the second most common.