394012668 has 48 divisors (see below), whose sum is σ = 1053645824. Its totient is φ = 112259520.

The previous prime is 394012657. The next prime is 394012669. The reversal of 394012668 is 866210493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394012669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24438 + ... + 37218.

Almost surely, 2^394012668 is an apocalyptic number.

It is an amenable number.

394012668 is an abundant number, since it is smaller than the sum of its proper divisors (659633156).

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

394012668 is a wasteful number, since it uses less digits than its factorization.

394012668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13162 (or 13160 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 394012668 is about 19849.7523410243. The cubic root of 394012668 is about 733.1115499204. Note that the first 3 decimals are identical.

The spelling of 394012668 in words is "three hundred ninety-four million, twelve thousand, six hundred sixty-eight".