Square Root Calculator › Square root of 398
Square Root of 398
√398 ≈ 19.949937
398 is not a perfect square, so √398 is an irrational number that is approximately 19.949937. In simplified radical form, √398 = √398.
√398 lies between √361 = 19 and √400 = 20.
| Number | 398 |
| Square root (decimal) | 19.949937 |
| Simplified radical | √398 |
| Perfect square? | No |
| Rational? | No |
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Frequently asked questions
Is 398 a perfect square?
No, 398 is not a perfect square, so its square root is irrational and approximately 19.949937.
What is the square root of 398 in simplest radical form?
√398 = √398 in simplest radical form.