393329418 has 8 divisors (see below), whose sum is σ = 786658848. Its totient is φ = 131109804.

The previous prime is 393329381. The next prime is 393329423. The reversal of 393329418 is 814923393.

It is a sphenic number, since it is the product of 3 distinct primes.

393329418 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 393329418.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32777446 + ... + 32777457.

It is an arithmetic number, because the mean of its divisors is an integer number (98332356).

Almost surely, 2^393329418 is an apocalyptic number.

393329418 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

393329418 is a wasteful number, since it uses less digits than its factorization.

393329418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65554908.

The product of its digits is 139968, while the sum is 42.

The square root of 393329418 is about 19832.5343312447. The cubic root of 393329418 is about 732.6875463969.

The spelling of 393329418 in words is "three hundred ninety-three million, three hundred twenty-nine thousand, four hundred eighteen".