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
In 2017, the city's GDP was estimated at US$305 billion (approximately R$407 billion), or 7% of the country's purchasing power parity (and the 75% of State of Rio de Janeiro's economy), making the Rio de Janeiro's fourth richest city in Latin America, behind only Mexico City, Sao Paulo and Buenos Aires, as well as the 30th largest metropolitan area GDP in the world - ahead of cities such as Rome, Barcelona and Beijing.