Is 396 a perfect square?

No, 396 is not a perfect square. Its square root is irrational.

What is 19.8997487421 squared?

19.8997487421 squared is approximately 396. (19.8997487421)² ≈ 396

√396 = 19.8997487421. 396 is not a perfect square; the result is irrational.

Instant answer with step-by-step solution

√396 = 19.8997487421

√396 = 19.8997487421

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

We need to find √396 — a number that when multiplied by itself equals 396.
396 is not a perfect square. Its square root is irrational.
It falls between √361 = 19 and √400 = 20.
Using the formula √N = N^(1/2): √396 = 396^0.5 = 19.8997487421
Verification: 19.8997487421 × 19.8997487421 ≈ 396 ✓ (rounded to 10 significant figures)

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