389868657 has 8 divisors (see below), whose sum is σ = 547184160. Its totient is φ = 246232800.

The previous prime is 389868643. The next prime is 389868749. The reversal of 389868657 is 756868983.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 389868657 - 2⁷ = 389868529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 389868657.

It is not an unprimeable number, because it can be changed into a prime (389861657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3419844 + ... + 3419957.

It is an arithmetic number, because the mean of its divisors is an integer number (68398020).

Almost surely, 2^389868657 is an apocalyptic number.

It is an amenable number.

389868657 is a deficient number, since it is larger than the sum of its proper divisors (157315503).

389868657 is a wasteful number, since it uses less digits than its factorization.

389868657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6839823.

The product of its digits is 17418240, while the sum is 60.

The square root of 389868657 is about 19745.0919724371. The cubic root of 389868657 is about 730.5323301789.

The spelling of 389868657 in words is "three hundred eighty-nine million, eight hundred sixty-eight thousand, six hundred fifty-seven".