Chad (full name, The Republic of Chad) covers an area of approximately 1.28 million sq km. Its terrain consists of broad, arid plains in the centre, desert in the north, mountains in the northwest and lowlands in south. Chad borders Cameroon, Central African Republic, Libya, Niger, Nigeria and Sudan, and is completely landlocked. The country is divided into 18 administrative regions: Batha, Borkou-Ennedi-Tibesti, Chari-Baguirmi, Guera, Hadjer-Lamis, Kanem, Lac, Logone Occidental, Logone Oriental, Mandoul, Mayo-Kebbi Est, Mayo-Kebbi Ouest, Moyen-Chari, Ouaddai, Salamat, Tandjile, Ville de N'Djamena and Wadi Fira. N'Djamena is the capital, with a time difference of 1 hour ahead of GMT. The currency is the CFA (Communaute Financiere Africaine) franc, and exports include cotton, oil, livestock and textiles. The population of approximately 10,000,000 people has an ethnic mix including 28% Sara, 12% Arab and 12% Mayo-Kebbi. Primary languages are French and Arabic, and the predominant religions are Islam and Christian.