389020879 has 8 divisors (see below), whose sum is σ = 421288560. Its totient is φ = 357087936.

The previous prime is 389020867. The next prime is 389020889. The reversal of 389020879 is 978020983.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389020879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389020889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81262 + ... + 85915.

It is an arithmetic number, because the mean of its divisors is an integer number (52661070).

Almost surely, 2^389020879 is an apocalyptic number.

389020879 is a deficient number, since it is larger than the sum of its proper divisors (32267681).

389020879 is a wasteful number, since it uses less digits than its factorization.

389020879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167369.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 389020879 is about 19723.6122198749. The cubic root of 389020879 is about 730.0024263383.

The spelling of 389020879 in words is "three hundred eighty-nine million, twenty thousand, eight hundred seventy-nine".