Square Root Calculator › Square root of 688
Square Root of 688
√688 ≈ 26.229754
688 is not a perfect square, so √688 is an irrational number that is approximately 26.229754. In simplified radical form, √688 = 4√43.
√688 lies between √676 = 26 and √729 = 27.
| Number | 688 |
| Square root (decimal) | 26.229754 |
| Simplified radical | 4√43 |
| Perfect square? | No |
| Rational? | No |
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Frequently asked questions
Is 688 a perfect square?
No, 688 is not a perfect square, so its square root is irrational and approximately 26.229754.
What is the square root of 688 in simplest radical form?
√688 = 4√43 in simplest radical form.