28178196 has 24 divisors (see below), whose sum is σ = 66677184. Its totient is φ = 9260160.

The previous prime is 28178179. The next prime is 28178207. The reversal of 28178196 is 69187182.

It is a congruent number.

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, 15685 + ... + 17388.

It is an arithmetic number, because the mean of its divisors is an integer number (2778216).

Almost surely, 2^28178196 is an apocalyptic number.

It is an amenable number.

28178196 is an abundant number, since it is smaller than the sum of its proper divisors (38498988).

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

28178196 is a wasteful number, since it uses less digits than its factorization.

28178196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33151 (or 33149 counting only the distinct ones).

The product of its digits is 48384, while the sum is 42.

The square root of 28178196 is about 5308.3138565838. The cubic root of 28178196 is about 304.3017116562.

The spelling of 28178196 in words is "twenty-eight million, one hundred seventy-eight thousand, one hundred ninety-six".