389158685 has 16 divisors (see below), whose sum is σ = 484887600. Its totient is φ = 299475456.

The previous prime is 389158669. The next prime is 389158691. The reversal of 389158685 is 586851983.

It can be written as a sum of positive squares in 8 ways, for example, as 16630084 + 372528601 = 4078^2 + 19301^2 .

It is a cyclic number.

It is not a de Polignac number, because 389158685 - 2⁴ = 389158669 is a prime.

It is a super-2 number, since 2×389158685² = 302888964221858450, which contains 22 as substring.

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, 35321 + ... + 45009.

It is an arithmetic number, because the mean of its divisors is an integer number (30305475).

Almost surely, 2^389158685 is an apocalyptic number.

It is an amenable number.

389158685 is a deficient number, since it is larger than the sum of its proper divisors (95728915).

389158685 is a wasteful number, since it uses less digits than its factorization.

389158685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10000.

The product of its digits is 2073600, while the sum is 53.

The square root of 389158685 is about 19727.1053375806. The cubic root of 389158685 is about 730.0886143756.

The spelling of 389158685 in words is "three hundred eighty-nine million, one hundred fifty-eight thousand, six hundred eighty-five".