394649685 has 64 divisors (see below), whose sum is σ = 729630720. Its totient is φ = 202176000.

The previous prime is 394649677. The next prime is 394649699. The reversal of 394649685 is 586946493.

394649685 is a `hidden beast` number, since 39 + 46 + 496 + 85 = 666.

It is not a de Polignac number, because 394649685 - 2³ = 394649677 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 757225 + ... + 757745.

It is an arithmetic number, because the mean of its divisors is an integer number (11400480).

Almost surely, 2^394649685 is an apocalyptic number.

It is an amenable number.

394649685 is a deficient number, since it is larger than the sum of its proper divisors (334981035).

394649685 is a wasteful number, since it uses less digits than its factorization.

394649685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747 (or 741 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 54.

The square root of 394649685 is about 19865.7918291721. The cubic root of 394649685 is about 733.5064213790.

The spelling of 394649685 in words is "three hundred ninety-four million, six hundred forty-nine thousand, six hundred eighty-five".