389806685 has 16 divisors (see below), whose sum is σ = 502267392. Its totient is φ = 289363200.

The previous prime is 389806657. The next prime is 389806699. The reversal of 389806685 is 586608983.

It is a happy number.

It is not a de Polignac number, because 389806685 - 2²⁰ = 388758109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26261 + ... + 38330.

It is an arithmetic number, because the mean of its divisors is an integer number (31391712).

Almost surely, 2^389806685 is an apocalyptic number.

It is an amenable number.

389806685 is a deficient number, since it is larger than the sum of its proper divisors (112460707).

389806685 is a wasteful number, since it uses less digits than its factorization.

389806685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64684.

The product of its (nonzero) digits is 2488320, while the sum is 53.

The square root of 389806685 is about 19743.5226086937. The cubic root of 389806685 is about 730.4936206052.

The spelling of 389806685 in words is "three hundred eighty-nine million, eight hundred six thousand, six hundred eighty-five".