318944397 has 8 divisors (see below), whose sum is σ = 434307456. Its totient is φ = 208105472.

The previous prime is 318944387. The next prime is 318944441. The reversal of 318944397 is 793449813.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-318944397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318944387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1130868 + ... + 1131149.

It is an arithmetic number, because the mean of its divisors is an integer number (54288432).

Almost surely, 2^318944397 is an apocalyptic number.

It is an amenable number.

318944397 is a deficient number, since it is larger than the sum of its proper divisors (115363059).

318944397 is a wasteful number, since it uses less digits than its factorization.

318944397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2262067.

The product of its digits is 653184, while the sum is 48.

The square root of 318944397 is about 17859.0144464917. The cubic root of 318944397 is about 683.2374435875.

It can be divided in two parts, 3189 and 44397, that added together give a triangular number (47586 = T₃₀₈).

The spelling of 318944397 in words is "three hundred eighteen million, nine hundred forty-four thousand, three hundred ninety-seven".