Square Root Calculator › Square root of 390
Square Root of 390
√390 ≈ 19.748418
390 is not a perfect square, so √390 is an irrational number that is approximately 19.748418. In simplified radical form, √390 = √390.
√390 lies between √361 = 19 and √400 = 20.
| Number | 390 |
| Square root (decimal) | 19.748418 |
| Simplified radical | √390 |
| Perfect square? | No |
| Rational? | No |
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Frequently asked questions
Is 390 a perfect square?
No, 390 is not a perfect square, so its square root is irrational and approximately 19.748418.
What is the square root of 390 in simplest radical form?
√390 = √390 in simplest radical form.