28890639942 has 16 divisors (see below), whose sum is σ = 58871493360. Its totient is φ = 9448511072.

The previous prime is 28890639941. The next prime is 28890639971. The reversal of 28890639942 is 24993609882.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28890639941) 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, 45425217 + ... + 45425852.

It is an arithmetic number, because the mean of its divisors is an integer number (3679468335).

Almost surely, 2^28890639942 is an apocalyptic number.

28890639942 is an abundant number, since it is smaller than the sum of its proper divisors (29980853418).

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

28890639942 is a wasteful number, since it uses less digits than its factorization.

28890639942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90851127.

The product of its (nonzero) digits is 13436928, while the sum is 60.

The spelling of 28890639942 in words is "twenty-eight billion, eight hundred ninety million, six hundred thirty-nine thousand, nine hundred forty-two".