318687242 has 8 divisors (see below), whose sum is σ = 485165856. Its totient is φ = 156965292.

The previous prime is 318687217. The next prime is 318687289. The reversal of 318687242 is 242786813.

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

It is a self number, because there is not a number n which added to its sum of digits gives 318687242.

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, 1188998 + ... + 1189265.

It is an arithmetic number, because the mean of its divisors is an integer number (60645732).

Almost surely, 2^318687242 is an apocalyptic number.

318687242 is a deficient number, since it is larger than the sum of its proper divisors (166478614).

318687242 is a wasteful number, since it uses less digits than its factorization.

318687242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2378332.

The product of its digits is 129024, while the sum is 41.

The square root of 318687242 is about 17851.8134092870. The cubic root of 318687242 is about 683.0537698108.

The spelling of 318687242 in words is "three hundred eighteen million, six hundred eighty-seven thousand, two hundred forty-two".