393387904 has 64 divisors (see below), whose sum is σ = 964585440. Its totient is φ = 155621376.

The previous prime is 393387899. The next prime is 393387937. The reversal of 393387904 is 409783393.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

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, 5239 + ... + 28534.

Almost surely, 2^393387904 is an apocalyptic number.

It is an amenable number.

393387904 is an abundant number, since it is smaller than the sum of its proper divisors (571197536).

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

393387904 is a wasteful number, since it uses less digits than its factorization.

393387904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33807 (or 33795 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 46.

The square root of 393387904 is about 19834.0087728124. The cubic root of 393387904 is about 732.7238601822.

The spelling of 393387904 in words is "three hundred ninety-three million, three hundred eighty-seven thousand, nine hundred four".