394867664 has 20 divisors (see below), whose sum is σ = 772209504. Its totient is φ = 195587808.

The previous prime is 394867639. The next prime is 394867691. The reversal of 394867664 is 466768493.

It is a congruent number.

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, 113612 + ... + 117035.

Almost surely, 2^394867664 is an apocalyptic number.

It is an amenable number.

394867664 is a deficient number, since it is larger than the sum of its proper divisors (377341840).

394867664 is a wasteful number, since it uses less digits than its factorization.

394867664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230762 (or 230756 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 53.

The square root of 394867664 is about 19871.2773620621. The cubic root of 394867664 is about 733.6414437155.

The spelling of 394867664 in words is "three hundred ninety-four million, eight hundred sixty-seven thousand, six hundred sixty-four".