389877975438 has 32 divisors (see below), whose sum is σ = 891478392576. Its totient is φ = 111352615488.

The previous prime is 389877975437. The next prime is 389877975511. The reversal of 389877975438 is 834579778983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389877975437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1596856 + ... + 1824747.

It is an arithmetic number, because the mean of its divisors is an integer number (27858699768).

Almost surely, 2^389877975438 is an apocalyptic number.

389877975438 is an abundant number, since it is smaller than the sum of its proper divisors (501600417138).

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

389877975438 is a wasteful number, since it uses less digits than its factorization.

389877975438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3424328.

The product of its digits is 2560481280, while the sum is 78.

The spelling of 389877975438 in words is "three hundred eighty-nine billion, eight hundred seventy-seven million, nine hundred seventy-five thousand, four hundred thirty-eight".