28189626 has 8 divisors (see below), whose sum is σ = 56379264. Its totient is φ = 9396540.

The previous prime is 28189619. The next prime is 28189643. The reversal of 28189626 is 62698182.

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

28189626 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2349130 + ... + 2349141.

It is an arithmetic number, because the mean of its divisors is an integer number (7047408).

Almost surely, 2^28189626 is an apocalyptic number.

28189626 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28189626 is a wasteful number, since it uses less digits than its factorization.

28189626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4698276.

The product of its digits is 82944, while the sum is 42.

The square root of 28189626 is about 5309.3903604840. The cubic root of 28189626 is about 304.3428510107.

The spelling of 28189626 in words is "twenty-eight million, one hundred eighty-nine thousand, six hundred twenty-six".