28860189 has 8 divisors (see below), whose sum is σ = 38505120. Its totient is φ = 19227696.

The previous prime is 28860173. The next prime is 28860197. The reversal of 28860189 is 98106882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28860189 - 2⁴ = 28860173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28860189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28860109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7074 + ... + 10380.

It is an arithmetic number, because the mean of its divisors is an integer number (4813140).

Almost surely, 2^28860189 is an apocalyptic number.

It is an amenable number.

28860189 is a deficient number, since it is larger than the sum of its proper divisors (9644931).

28860189 is a wasteful number, since it uses less digits than its factorization.

28860189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6219.

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 28860189 is about 5372.1679981177. The cubic root of 28860189 is about 306.7371586271.

The spelling of 28860189 in words is "twenty-eight million, eight hundred sixty thousand, one hundred eighty-nine".