√688 = 26.2297540972. 688 is not a perfect square; the result is irrational.

Is 688 a perfect square?

No, 688 is not a perfect square. Its square root is irrational.

What is 26.2297540972 squared?

26.2297540972 squared is approximately 688. (26.2297540972)² ≈ 688

Instant answer with step-by-step solution

√688 = 26.2297540972

√688 = 26.2297540972

⚠ 688 is not a perfect square — result rounded to 10 significant figures

We need to find √688 — a number that when multiplied by itself equals 688.
688 is not a perfect square. Its square root is irrational.
It falls between √676 = 26 and √729 = 27.
Using the formula √N = N^(1/2): √688 = 688^0.5 = 26.2297540972
Verification: 26.2297540972 × 26.2297540972 ≈ 688 ✓ (rounded to 10 significant figures)

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