Filtering string/float/integer values in pandas dataframe columns

How can I filter only string values/ integer/ float values in one column (SIC) in a pandas data frame like below?

                         SIC
1                      246804
2                      135272
3                      898.01
4                     3453.33
5                       shine  
6                        add
7                         522
8                         Nan
9                      string
10                      29.11
11                        20