What number multiplied by itself equals 406?

Here we will answer: What number multiplied by itself gives 406? In other words, what number times itself will equal 406?

We have identified many different ways of getting the answer to this question:

Algebra Method:
Make an algebra equation and solve for x:

x • x = 406
x ≈ 20.149

Square Root Method:
Take the square root of 406 to get the answer:

√406 ≈ 20.149

Exponent Method:
Make the base 406 and the exponent 0.5 to get the answer:

406^0.5 ≈ 20.149

There you go! Now you know how to calculate "What number multiplied by itself equals 406?"

The bottom line is that 20.149 times itself equals approximately 406 as illustrated here:

20.149 x 20.149 ≈ 406

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The answer on this page is rounded to the nearest thousandth, if necessary.