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_2289806_1 ( prod__number INTEGER, episode__number VARCHAR )

### Question ###
How many product # have episode 1?

### Accurate SQL ###

SELECT MAX(prod__number) FROM table_2289806_1 WHERE episode__number = 1