Rio de Janeiro
Rio has more people living in slums than any other city in Brazil, according to the 2010 Census. More than 1,500,000 people live in its 763 favelas, 22% of Rio's total population. São Paulo, the largest city in Brazil, has more favelas (1,020) in sheer numbers, but proportionally has fewer people living in favelas than Rio.
Economy of Rio de Janeiro
Having been the capital for more than 300 years, the city of Rio de Janeiro is the site for the headquarters of many private, national, multinational, and state corporations, even when their factories were located in other cities or states. Despite the transfer of the capital to Brasília, many of these headquarters remained within the Rio metropolitan area, including those of Petrobrás, the state oil company, and the National Economic and Social Development Bank, a federal investment bank. As with manufacturing, Rio is an important financial center, second only to São Paulo in volume of business in financial markets and in banking. Its securities market, although declining in significance relative to São Paulo, is still of major importance. Owing to the proximity of Rio's port facilities, many of Brazil's export-import companies are headquartered in the city.