=IF(ERROR.TYPE(A1)=6,"This error is shows #NUM","")

NO, but ISERR and ISERROR will return TRUE if the argument is #NUM

ISERROR or ISERR

See help for the usage of these.

But may be better to find out why you're getting the #NUM! error and work
around it.

From Help...............................

Correct a #NUM! error
Occurs with invalid numeric values in a formula or function.

Click the cell that displays the error, click the button that appears , and
then click Trace Error if it appears.

Review the possible causes and solutions.

Possible causes and solutions
Using an unacceptable argument in a function that requires a numeric argument

Make sure the arguments (argument: The values that a function uses to perform
operations or calculations. The type of argument a function uses is specific
to the function. Common arguments that are used within functions include
numbers, text, cell references, and names.) used in the function are numbers.
For example, even if the value you want to enter is $1,000, enter 1000 in the
formula.

Using a worksheet function that iterates, such as IRR or RATE, and the
function cannot find a result

Use a different starting value for the worksheet function.

Change the number of times Microsoft Excel iterates formulas.

How?

On the Tools menu, click Options, and then click the Calculation tab.

Select the Iteration check box.

To set the maximum number of times Microsoft Excel will recalculate, type the
number of iterations in the Maximum iterations box. The higher the number of
iterations, the more time Excel needs to calculate a worksheet.

To set the maximum amount of change you will accept between calculation
results, type the amount in the Maximum change box. The smaller the number,
the more accurate the result and the more time Excel needs to calculate a
worksheet.

Entering a formula that produces a number that is too large or too small to be
represented in Microsoft Excel

Gord Dibben Excel MVP