394016664 has 16 divisors (see below), whose sum is σ = 985041720. Its totient is φ = 131338880.

The previous prime is 394016621. The next prime is 394016671. The reversal of 394016664 is 466610493.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8208657 + ... + 8208704.

Almost surely, 2^394016664 is an apocalyptic number.

It is an amenable number.

394016664 is an abundant number, since it is smaller than the sum of its proper divisors (591025056).

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

394016664 is a wasteful number, since it uses less digits than its factorization.

394016664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16417370 (or 16417366 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 39.

The square root of 394016664 is about 19849.8529969368. The cubic root of 394016664 is about 733.1140282704.

The spelling of 394016664 in words is "three hundred ninety-four million, sixteen thousand, six hundred sixty-four".