28036189 has 4 divisors (see below), whose sum is σ = 28052640. Its totient is φ = 28019740.

The previous prime is 28036187. The next prime is 28036193. The reversal of 28036189 is 98163082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28036189 - 2¹ = 28036187 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 (28036181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5329 + ... + 9190.

It is an arithmetic number, because the mean of its divisors is an integer number (7013160).

Almost surely, 2^28036189 is an apocalyptic number.

It is an amenable number.

28036189 is a deficient number, since it is larger than the sum of its proper divisors (16451).

28036189 is a wasteful number, since it uses less digits than its factorization.

28036189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16450.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 28036189 is about 5294.9210570130. The cubic root of 28036189 is about 303.7896636266.

The spelling of 28036189 in words is "twenty-eight million, thirty-six thousand, one hundred eighty-nine".