391318848 has 42 divisors (see below), whose sum is σ = 1121646474. Its totient is φ = 130439424.

The previous prime is 391318847. The next prime is 391318891. The reversal of 391318848 is 848813193.

It can be written as a sum of positive squares in only one way, i.e., 208744704 + 182574144 = 14448^2 + 13512^2 .

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391318841) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 339111 + ... + 340262.

Almost surely, 2^391318848 is an apocalyptic number.

It is an amenable number.

391318848 is an abundant number, since it is smaller than the sum of its proper divisors (730327626).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

391318848 is a wasteful number, since it uses less digits than its factorization.

391318848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679391 (or 679378 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 391318848 is about 19781.7807085207. The cubic root of 391318848 is about 731.4369942994.

The spelling of 391318848 in words is "three hundred ninety-one million, three hundred eighteen thousand, eight hundred forty-eight".