394306638018 has 16 divisors (see below), whose sum is σ = 791681813280. Its totient is φ = 130924123136.

The previous prime is 394306637999. The next prime is 394306638049. The reversal of 394306638018 is 810836603493.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127854048 + ... + 127857131.

It is an arithmetic number, because the mean of its divisors is an integer number (49480113330).

Almost surely, 2^394306638018 is an apocalyptic number.

394306638018 is an abundant number, since it is smaller than the sum of its proper divisors (397375175262).

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

394306638018 is a wasteful number, since it uses less digits than its factorization.

394306638018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255711441.

The product of its (nonzero) digits is 2239488, while the sum is 51.

The spelling of 394306638018 in words is "three hundred ninety-four billion, three hundred six million, six hundred thirty-eight thousand, eighteen".