394016307138 has 24 divisors (see below), whose sum is σ = 869809585788. Its totient is φ = 128860678752.

The previous prime is 394016307133. The next prime is 394016307149. The reversal of 394016307138 is 831703610493.

394016307138 is a `hidden beast` number, since 3 + 9 + 4 + 0 + 1 + 630 + 7 + 1 + 3 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 318268607409 + 75747699729 = 564153^2 + 275223^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 394016307093 and 394016307102.

It is not an unprimeable number, because it can be changed into a prime (394016307133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 206506545 + ... + 206508452.

Almost surely, 2^394016307138 is an apocalyptic number.

394016307138 is an abundant number, since it is smaller than the sum of its proper divisors (475793278650).

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

394016307138 is a wasteful number, since it uses less digits than its factorization.

394016307138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413015058 (or 413015055 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The spelling of 394016307138 in words is "three hundred ninety-four billion, sixteen million, three hundred seven thousand, one hundred thirty-eight".