Cube Root of 158

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Cube root of

What is the cube root of 158?

Answer

∛158 ≈
5.4061

Real cube root: the only number whose cube is 158.

≈ — rounded to 4 decimal places. 158 is not the cube of a rational number, so ∛158 is irrational: its decimal expansion never ends and never repeats.

Prime factors
158 = 2 × 79
Take out of the root
No prime appears three times, so ∛158 is already in simplest form.
Between cubes
5³ = 125 < 158 < 216 = 6³, so 5 < ∛158 < 6 and ∛158 ≈ 5.4061

See Also

FAQ

What is the cube root of 158?

∛158 ≈ 5.4061

Can ∛158 be simplified?

No: no prime appears three times in 158, so its only cube factor is 1 and ∛158 is already in simplest form. Since 5³ = 125 < 158 < 216 = 6³, ∛158 lies between 5 and 6: ∛158 ≈ 5.4061.

Is ∛158 a rational number?

No: 158 is not the cube of a rational number, and the cube root of a fraction p/q in lowest terms is rational only when p and q are both cubes. So ∛158 is irrational; its decimal never ends and never repeats: ∛158 ≈ 5.4061.