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_2181798_1 (top_5 INTEGER, avg_finish VARCHAR)

### Question ###
Name the max top 5 for avg finish being 27.6

### Accurate SQL ###

SELECT MAX(top_5) FROM table_2181798_1 WHERE avg_finish = "27.6"