28989189 has 12 divisors (see below), whose sum is σ = 42266016. Its totient is φ = 19144872.

The previous prime is 28989157. The next prime is 28989197. The reversal of 28989189 is 98198982.

It is a happy number.

It is not a de Polignac number, because 28989189 - 2⁵ = 28989157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28989109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14089 + ... + 16014.

It is an arithmetic number, because the mean of its divisors is an integer number (3522168).

Almost surely, 2^28989189 is an apocalyptic number.

It is an amenable number.

28989189 is a deficient number, since it is larger than the sum of its proper divisors (13276827).

28989189 is a wasteful number, since it uses less digits than its factorization.

28989189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30216 (or 30213 counting only the distinct ones).

The product of its digits is 746496, while the sum is 54.

The square root of 28989189 is about 5384.1609374163. The cubic root of 28989189 is about 307.1934998726.

The spelling of 28989189 in words is "twenty-eight million, nine hundred eighty-nine thousand, one hundred eighty-nine".