Official nameJamhuryat es-Sudan (The Republic of The Sudan)CapitalKhartoumPopulation estimate (2015)40·25 millionInternet domain extension.sdCurrencyThe unit of currency is the Sudanese pound (SDG), which consists of 100 piastres.TerritorySudan is bounded in the north by Egypt, north-east by the Red Sea, east by Eritrea and Ethiopia, south by South Sudan, south-west by the Central African Republic, west by Chad and north-west by Libya.LanguagesArabic and English are both official languages.Source: The Statesman's Yearbook 2018. Palgrave Macmillan, London Synonyms and related words