28189982 has 16 divisors (see below), whose sum is σ = 43535232. Its totient is φ = 13684440.

The previous prime is 28189981. The next prime is 28190017. The reversal of 28189982 is 28998182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28189981) 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 7 ways as a sum of consecutive naturals, for example, 8033 + ... + 10995.

It is an arithmetic number, because the mean of its divisors is an integer number (2720952).

Almost surely, 2^28189982 is an apocalyptic number.

28189982 is a deficient number, since it is larger than the sum of its proper divisors (15345250).

28189982 is a wasteful number, since it uses less digits than its factorization.

28189982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3103.

The product of its digits is 165888, while the sum is 47.

The square root of 28189982 is about 5309.4238858844. The cubic root of 28189982 is about 304.3441321628.

The spelling of 28189982 in words is "twenty-eight million, one hundred eighty-nine thousand, nine hundred eighty-two".