393160816 has 20 divisors (see below), whose sum is σ = 782338072. Its totient is φ = 191267136.

The previous prime is 393160811. The next prime is 393160829. The reversal of 393160816 is 618061393.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393160811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 331470 + ... + 332653.

Almost surely, 2^393160816 is an apocalyptic number.

It is an amenable number.

393160816 is a deficient number, since it is larger than the sum of its proper divisors (389177256).

393160816 is a wasteful number, since it uses less digits than its factorization.

393160816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664168 (or 664162 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 393160816 is about 19828.2832338052. The cubic root of 393160816 is about 732.5828417608.

The spelling of 393160816 in words is "three hundred ninety-three million, one hundred sixty thousand, eight hundred sixteen".