Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What is Population in Millions, when GDP 2012 Millions of Euro is 600,638?

### Inputs:
table_name: table, columns: ['s Member state', 'GDP 2012 millions of euro', 'Population in millions', 'GDP (PPP) per capita 2012 euro', 'GDP (Nominal) per capita 2012 euro', 'GDP (PPP) per capita 2012 EU27 = 100']

### Response:
SELECT Population in millions FROM table WHERE GDP 2012 millions of euro = 600,638