28206189 has 36 divisors (see below), whose sum is σ = 45645600. Its totient is φ = 16766640.

The previous prime is 28206181. The next prime is 28206197. The reversal of 28206189 is 98160282.

It is an interprime number because it is at equal distance from previous prime (28206181) and next prime (28206197).

It is not a de Polignac number, because 28206189 - 2³ = 28206181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28206181) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 64032 + ... + 64470.

Almost surely, 2^28206189 is an apocalyptic number.

It is an amenable number.

28206189 is a deficient number, since it is larger than the sum of its proper divisors (17439411).

28206189 is a wasteful number, since it uses less digits than its factorization.

28206189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526 (or 512 counting only the distinct ones).

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

The square root of 28206189 is about 5310.9499150340. The cubic root of 28206189 is about 304.4024455545.

It can be divided in two parts, 2820 and 6189, that added together give a palindrome (9009).

The spelling of 28206189 in words is "twenty-eight million, two hundred six thousand, one hundred eighty-nine".