393694436 has 12 divisors (see below), whose sum is σ = 692428800. Its totient is φ = 195857640.

The previous prime is 393694417. The next prime is 393694439. The reversal of 393694436 is 634496393.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (393694439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246500 + ... + 248091.

It is an arithmetic number, because the mean of its divisors is an integer number (57702400).

Almost surely, 2^393694436 is an apocalyptic number.

It is an amenable number.

393694436 is a deficient number, since it is larger than the sum of its proper divisors (298734364).

393694436 is a wasteful number, since it uses less digits than its factorization.

393694436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494794 (or 494792 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 47.

The square root of 393694436 is about 19841.7347023893. The cubic root of 393694436 is about 732.9141261559.

The spelling of 393694436 in words is "three hundred ninety-three million, six hundred ninety-four thousand, four hundred thirty-six".