316491388 has 12 divisors (see below), whose sum is σ = 556016832. Its totient is φ = 157629440.

The previous prime is 316491361. The next prime is 316491401. The reversal of 316491388 is 883194613.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152908 + ... + 154963.

It is an arithmetic number, because the mean of its divisors is an integer number (46334736).

Almost surely, 2^316491388 is an apocalyptic number.

It is an amenable number.

316491388 is a deficient number, since it is larger than the sum of its proper divisors (239525444).

316491388 is a wasteful number, since it uses less digits than its factorization.

316491388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308132 (or 308130 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The square root of 316491388 is about 17790.2048329973. The cubic root of 316491388 is about 681.4813352559.

The spelling of 316491388 in words is "three hundred sixteen million, four hundred ninety-one thousand, three hundred eighty-eight".