28062189 has 18 divisors (see below), whose sum is σ = 43062890. Its totient is φ = 17606016.

The previous prime is 28062131. The next prime is 28062193. The reversal of 28062189 is 98126082.

28062189 is a `hidden beast` number, since 28 + 0 + 621 + 8 + 9 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 10673289 + 17388900 = 3267^2 + 4170^2 .

It is a de Polignac number, because none of the positive numbers 2^k-28062189 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28062109) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2794 + ... + 7995.

Almost surely, 2^28062189 is an apocalyptic number.

It is an amenable number.

28062189 is a deficient number, since it is larger than the sum of its proper divisors (15000701).

28062189 is a wasteful number, since it uses less digits than its factorization.

28062189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10829 (or 10809 counting only the distinct ones).

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

The square root of 28062189 is about 5297.3756710281. The cubic root of 28062189 is about 303.8835433724.

The spelling of 28062189 in words is "twenty-eight million, sixty-two thousand, one hundred eighty-nine".