28985178 has 16 divisors (see below), whose sum is σ = 58484736. Its totient is φ = 9576000.

The previous prime is 28985167. The next prime is 28985197. The reversal of 28985178 is 87158982.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20698 + ... + 22053.

It is an arithmetic number, because the mean of its divisors is an integer number (3655296).

Almost surely, 2^28985178 is an apocalyptic number.

28985178 is an abundant number, since it is smaller than the sum of its proper divisors (29499558).

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

28985178 is a wasteful number, since it uses less digits than its factorization.

28985178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42869.

The product of its digits is 322560, while the sum is 48.

The square root of 28985178 is about 5383.7884430947. The cubic root of 28985178 is about 307.1793312578.

The spelling of 28985178 in words is "twenty-eight million, nine hundred eighty-five thousand, one hundred seventy-eight".