389020878 has 24 divisors (see below), whose sum is σ = 843242400. Its totient is φ = 129617664.

The previous prime is 389020867. The next prime is 389020889. The reversal of 389020878 is 878020983.

It is an interprime number because it is at equal distance from previous prime (389020867) and next prime (389020889).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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 11 ways as a sum of consecutive naturals, for example, 74683 + ... + 79721.

It is an arithmetic number, because the mean of its divisors is an integer number (35135100).

Almost surely, 2^389020878 is an apocalyptic number.

389020878 is an abundant number, since it is smaller than the sum of its proper divisors (454221522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

389020878 is a wasteful number, since it uses less digits than its factorization.

389020878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9336 (or 9333 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 389020878 is about 19723.6121945246. The cubic root of 389020878 is about 730.0024257128.

The spelling of 389020878 in words is "three hundred eighty-nine million, twenty thousand, eight hundred seventy-eight".