> some european countries like Bulgaria have a median household income of around 400€/month.
Irrelevant. Medians don’t aggregate the way you think they do. To compute global median, you need to know shapes of distributions in each country, and population of the countries.
You pulled that number out of thin air, didn't you?
I mean, some european countries like Bulgaria have a median household income of around 400€/month.
Do you honestly believe that Bulgaria is one of the world's poorest countries?
Getting back to reality, according to wikipedia, which cites OECD, India's median income in PPP is currently around 2500$/year.
India ranks 43rd in the world's median household income ranking.
https://stats.oecd.org/Index.aspx?DataSetCode=IDD