28026189 has 32 divisors (see below), whose sum is σ = 42768000. Its totient is φ = 18133632.

The previous prime is 28026181. The next prime is 28026191. The reversal of 28026189 is 98162082.

It is not a de Polignac number, because 28026189 - 2³ = 28026181 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28026181) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 257067 + ... + 257175.

It is an arithmetic number, because the mean of its divisors is an integer number (1336500).

Almost surely, 2^28026189 is an apocalyptic number.

It is an amenable number.

28026189 is a deficient number, since it is larger than the sum of its proper divisors (14741811).

28026189 is a wasteful number, since it uses less digits than its factorization.

28026189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314 (or 308 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 28026189 is about 5293.9766716524. The cubic root of 28026189 is about 303.7535405775.

The spelling of 28026189 in words is "twenty-eight million, twenty-six thousand, one hundred eighty-nine".