Is 644 a perfect square?

No, 644 is not a perfect square. Its square root is irrational.

What is 25.3771550809 squared?

25.3771550809 squared is approximately 644. (25.3771550809)² ≈ 644

√644 = 25.3771550809. 644 is not a perfect square; the result is irrational.

Instant answer with step-by-step solution

√644 = 25.3771550809

√644 = 25.3771550809

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

We need to find √644 — a number that when multiplied by itself equals 644.
644 is not a perfect square. Its square root is irrational.
It falls between √625 = 25 and √676 = 26.
Using the formula √N = N^(1/2): √644 = 644^0.5 = 25.3771550809
Verification: 25.3771550809 × 25.3771550809 ≈ 644 ✓ (rounded to 10 significant figures)

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