28084189 has 16 divisors (see below), whose sum is σ = 32842368. Its totient is φ = 23519232.

The previous prime is 28084181. The next prime is 28084193. The reversal of 28084189 is 98148082.

It is a cyclic number.

It is not a de Polignac number, because 28084189 - 2³ = 28084181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28084181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109149 + ... + 109405.

It is an arithmetic number, because the mean of its divisors is an integer number (2052648).

Almost surely, 2^28084189 is an apocalyptic number.

It is an amenable number.

28084189 is a deficient number, since it is larger than the sum of its proper divisors (4758179).

28084189 is a wasteful number, since it uses less digits than its factorization.

28084189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564.

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 28084189 is about 5299.4517640979. The cubic root of 28084189 is about 303.9629347989.

The spelling of 28084189 in words is "twenty-eight million, eighty-four thousand, one hundred eighty-nine".