√428 = 20.6881608656. 428 is not a perfect square; the result is irrational.

Is 428 a perfect square?

No, 428 is not a perfect square. Its square root is irrational.

What is 20.6881608656 squared?

20.6881608656 squared is approximately 428. (20.6881608656)² ≈ 428

Instant answer with step-by-step solution

√428 = 20.6881608656

√428 = 20.6881608656

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

We need to find √428 — a number that when multiplied by itself equals 428.
428 is not a perfect square. Its square root is irrational.
It falls between √400 = 20 and √441 = 21.
Using the formula √N = N^(1/2): √428 = 428^0.5 = 20.6881608656
Verification: 20.6881608656 × 20.6881608656 ≈ 428 ✓ (rounded to 10 significant figures)

√ =