394739685 has 48 divisors (see below), whose sum is σ = 720720000. Its totient is φ = 199469952.

The previous prime is 394739669. The next prime is 394739701. The reversal of 394739685 is 586937493.

394739685 is a `hidden beast` number, since 3 + 9 + 473 + 96 + 85 = 666.

It is an interprime number because it is at equal distance from previous prime (394739669) and next prime (394739701).

It is not a de Polignac number, because 394739685 - 2⁴ = 394739669 is a prime.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 111066 + ... + 114564.

It is an arithmetic number, because the mean of its divisors is an integer number (15015000).

Almost surely, 2^394739685 is an apocalyptic number.

It is an amenable number.

394739685 is a deficient number, since it is larger than the sum of its proper divisors (325980315).

394739685 is a wasteful number, since it uses less digits than its factorization.

394739685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3642 (or 3639 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 54.

The square root of 394739685 is about 19868.0569004621. The cubic root of 394739685 is about 733.5621759403.

The spelling of 394739685 in words is "three hundred ninety-four million, seven hundred thirty-nine thousand, six hundred eighty-five".