318948399 has 72 divisors (see below), whose sum is σ = 600779088. Its totient is φ = 161118720.

The previous prime is 318948397. The next prime is 318948437. The reversal of 318948399 is 993849813.

It is not a de Polignac number, because 318948399 - 2¹ = 318948397 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318948397) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 178599 + ... + 180375.

It is an arithmetic number, because the mean of its divisors is an integer number (8344154).

Almost surely, 2^318948399 is an apocalyptic number.

318948399 is a deficient number, since it is larger than the sum of its proper divisors (281830689).

318948399 is a wasteful number, since it uses less digits than its factorization.

With its successor (318948400) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (1835).

With its successor (318948400) it forms an eRAP, since the sums of their prime factors are consecutive (1845 and 1846).

318948399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845 (or 1835 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 318948399 is about 17859.1264903970. The cubic root of 318948399 is about 683.2403012484.

The spelling of 318948399 in words is "three hundred eighteen million, nine hundred forty-eight thousand, three hundred ninety-nine".