Step 1: Interchange the first and second digits.
385 → 835
472 → 742
961 → 691
528 → 258
284 → 824
Step 2: Arrange these in descending order.
835, 824, 742, 691, 258
Step 3: Identify the second number.
Second number is 824, which corresponds to original number 284.
Step 4: Conclusion.
Thus, the answer is 284.