28189974 has 24 divisors (see below), whose sum is σ = 58269240. Its totient is φ = 9091680.

The previous prime is 28189963. The next prime is 28189979. The reversal of 28189974 is 47998182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28189979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3322 + ... + 8210.

It is an arithmetic number, because the mean of its divisors is an integer number (2427885).

Almost surely, 2^28189974 is an apocalyptic number.

28189974 is an abundant number, since it is smaller than the sum of its proper divisors (30079266).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28189974 is a wasteful number, since it uses less digits than its factorization.

28189974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4956 (or 4925 counting only the distinct ones).

The product of its digits is 290304, while the sum is 48.

The square root of 28189974 is about 5309.4231325070. The cubic root of 28189974 is about 304.3441033730.

The spelling of 28189974 in words is "twenty-eight million, one hundred eighty-nine thousand, nine hundred seventy-four".