I think it helps to consider the south and the north separately for this calculation - Sweden has a population density of 23.6/km^2 - indeed quite low, but to put it into context, the north has a population density of approximately 4.9/km^2 while the south has around 50/km^2 - the population is very lopsided. The north is bigger than the south as well, accounting for around 60% of the total area of the country.
I think it helps to consider the south and the north separately for this calculation - Sweden has a population density of 23.6/km^2 - indeed quite low, but to put it into context, the north has a population density of approximately 4.9/km^2 while the south has around 50/km^2 - the population is very lopsided. The north is bigger than the south as well, accounting for around 60% of the total area of the country.