√398 = 19.9499373433. 398 is not a perfect square; the result is irrational.

Is 398 a perfect square?

No, 398 is not a perfect square. Its square root is irrational.

What is 19.9499373433 squared?

19.9499373433 squared is approximately 398. (19.9499373433)² ≈ 398

Instant answer with step-by-step solution

√398 = 19.9499373433

√398 = 19.9499373433

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

We need to find √398 — a number that when multiplied by itself equals 398.
398 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): √398 = 398^0.5 = 19.9499373433
Verification: 19.9499373433 × 19.9499373433 ≈ 398 ✓ (rounded to 10 significant figures)

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