Is 388 a prime number? What are the divisors of 388?

## Parity of 388

388 is an even number, because it is evenly divisible by 2: 388 / 2 = 194.

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## Is 388 a perfect square number?

A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 388 is about 19.698.

Thus, the square root of 388 is not an integer, and therefore 388 is not a square number.

## What is the square number of 388?

The square of a number (here 388) is the result of the product of this number (388) by itself (i.e., 388 × 388); the square of 388 is sometimes called "raising 388 to the power 2", or "388 squared".

The square of 388 is 150 544 because 388 × 388 = 3882 = 150 544.

As a consequence, 388 is the square root of 150 544.

## Number of digits of 388

388 is a number with 3 digits.

## What are the multiples of 388?

The multiples of 388 are all integers evenly divisible by 388, that is all numbers such that the remainder of the division by 388 is zero. There are infinitely many multiples of 388. The smallest multiples of 388 are:

## How to determine whether an integer is a prime number?

To determine the primality of a number, several algorithms can be used. The most naive technique is to test all divisors strictly smaller to the number of which we want to determine the primality (here 388). First, we can eliminate all even numbers greater than 2 (and hence 4, 6, 8…). Then, we can stop this check when we reach the square root of the number of which we want to determine the primality (here the square root is about 19.698). Historically, the sieve of Eratosthenes (dating from the Greek mathematics) implements this technique in a relatively efficient manner.

More modern techniques include the sieve of Atkin, probabilistic algorithms, and the cyclotomic AKS test.

## Numbers near 388

• Preceding numbers: …386, 387
• Following numbers: 389, 390

### Nearest numbers from 388

• Preceding prime number: 383
• Following prime number: 389
Find out whether some integer is a prime number