393694438 has 4 divisors (see below), whose sum is σ = 590541660. Its totient is φ = 196847218.

The previous prime is 393694417. The next prime is 393694439. The reversal of 393694438 is 834496393.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 393694391 and 393694400.

It is a congruent number.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98423608 + ... + 98423611.

It is an arithmetic number, because the mean of its divisors is an integer number (147635415).

Almost surely, 2^393694438 is an apocalyptic number.

393694438 is a deficient number, since it is larger than the sum of its proper divisors (196847222).

393694438 is a wasteful number, since it uses less digits than its factorization.

393694438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196847221.

The product of its digits is 1679616, while the sum is 49.

The square root of 393694438 is about 19841.7347527881. The cubic root of 393694438 is about 732.9141273970.

The spelling of 393694438 in words is "three hundred ninety-three million, six hundred ninety-four thousand, four hundred thirty-eight".