28604886 has 8 divisors (see below), whose sum is σ = 57209784. Its totient is φ = 9534960.

The previous prime is 28604881. The next prime is 28604887. The reversal of 28604886 is 68840682.

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

28604886 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28604881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2383735 + ... + 2383746.

It is an arithmetic number, because the mean of its divisors is an integer number (7151223).

Almost surely, 2^28604886 is an apocalyptic number.

28604886 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.

28604886 is a wasteful number, since it uses less digits than its factorization.

28604886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4767486.

The product of its (nonzero) digits is 147456, while the sum is 42.

The square root of 28604886 is about 5348.3535784389. The cubic root of 28604886 is about 305.8299922833.

The spelling of 28604886 in words is "twenty-eight million, six hundred four thousand, eight hundred eighty-six".