Square Root Calculator › Square root of 428
Square Root of 428
√428 ≈ 20.688161
428 is not a perfect square, so √428 is an irrational number that is approximately 20.688161. In simplified radical form, √428 = 2√107.
√428 lies between √400 = 20 and √441 = 21.
| Number | 428 |
| Square root (decimal) | 20.688161 |
| Simplified radical | 2√107 |
| Perfect square? | No |
| Rational? | No |
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Frequently asked questions
Is 428 a perfect square?
No, 428 is not a perfect square, so its square root is irrational and approximately 20.688161.
What is the square root of 428 in simplest radical form?
√428 = 2√107 in simplest radical form.