TST: Added test for issue 26568 (#42591)

Author: Alex-JG3

pandas/tests/reshape/test_pivot.py

@@ -2148,6 +2148,23 @@ def test_pivot_table_sort_false(self):
         )
         tm.assert_frame_equal(result, expected)
 
+    def test_pivot_table_with_margins_and_numeric_columns(self):
+        # GH 26568
+        df = DataFrame([["a", "x", 1], ["a", "y", 2], ["b", "y", 3], ["b", "z", 4]])
+        df.columns = [10, 20, 30]
+
+        result = df.pivot_table(
+            index=10, columns=20, values=30, aggfunc="sum", fill_value=0, margins=True
+        )
+
+        expected = DataFrame([[1, 2, 0, 3], [0, 3, 4, 7], [1, 5, 4, 10]])
+        expected.columns = ["x", "y", "z", "All"]
+        expected.index = ["a", "b", "All"]
+        expected.columns.name = 20
+        expected.index.name = 10
+
+        tm.assert_frame_equal(result, expected)
+
 
 class TestPivot:
     def test_pivot(self):