394668684 has 72 divisors (see below), whose sum is σ = 1095843840. Its totient is φ = 119208672.

The previous prime is 394668683. The next prime is 394668691. The reversal of 394668684 is 486866493.

It is a self number, because there is not a number n which added to its sum of digits gives 394668684.

It is not an unprimeable number, because it can be changed into a prime (394668683) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 3189 + ... + 28275.

Almost surely, 2^394668684 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394668684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (547921920).

394668684 is an abundant number, since it is smaller than the sum of its proper divisors (701175156).

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

394668684 is a wasteful number, since it uses less digits than its factorization.

394668684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25139 (or 25134 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 54.

The square root of 394668684 is about 19866.2700072258. The cubic root of 394668684 is about 733.5181918726.

The spelling of 394668684 in words is "three hundred ninety-four million, six hundred sixty-eight thousand, six hundred eighty-four".