28985666958 has 24 divisors (see below), whose sum is σ = 62818123368. Its totient is φ = 9659451312.

The previous prime is 28985666929. The next prime is 28985666971. The reversal of 28985666958 is 85966658982.

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, 129085 + ... + 273192.

It is an arithmetic number, because the mean of its divisors is an integer number (2617421807).

Almost surely, 2^28985666958 is an apocalyptic number.

28985666958 is an abundant number, since it is smaller than the sum of its proper divisors (33832456410).

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

28985666958 is a wasteful number, since it uses less digits than its factorization.

28985666958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406288 (or 406285 counting only the distinct ones).

The product of its digits is 447897600, while the sum is 72.

The spelling of 28985666958 in words is "twenty-eight billion, nine hundred eighty-five million, six hundred sixty-six thousand, nine hundred fifty-eight".