394808018 has 16 divisors (see below), whose sum is σ = 674139456. Its totient is φ = 171655440.

The previous prime is 394808003. The next prime is 394808081. The reversal of 394808018 is 810808493.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389621 + ... + 390632.

It is an arithmetic number, because the mean of its divisors is an integer number (42133716).

Almost surely, 2^394808018 is an apocalyptic number.

394808018 is a deficient number, since it is larger than the sum of its proper divisors (279331438).

394808018 is a wasteful number, since it uses less digits than its factorization.

394808018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780289.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 394808018 is about 19869.7764959750. The cubic root of 394808018 is about 733.6045022412.

The spelling of 394808018 in words is "three hundred ninety-four million, eight hundred eight thousand, eighteen".