Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_24 (code INTEGER, density__inh_km²_ VARCHAR, land_area__hectares_ VARCHAR)

### Question ###
How many codes have a density of 621.68, and a Land area (hectares) larger than 75.28?

### Accurate SQL ###

SELECT SUM(code) FROM table_name_24 WHERE density__inh_km²_ = 621.68 AND land_area__hectares_ > 75.28