28104688 has 20 divisors (see below), whose sum is σ = 54848920. Its totient is φ = 13950144.

The previous prime is 28104679. The next prime is 28104701. The reversal of 28104688 is 88640182.

It is a congruent 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, 4095 + ... + 8542.

It is an arithmetic number, because the mean of its divisors is an integer number (2742446).

Almost surely, 2^28104688 is an apocalyptic number.

It is an amenable number.

28104688 is a deficient number, since it is larger than the sum of its proper divisors (26744232).

28104688 is a wasteful number, since it uses less digits than its factorization.

28104688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12784 (or 12778 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 37.

The square root of 28104688 is about 5301.3854792875. The cubic root of 28104688 is about 304.0368722589.

The spelling of 28104688 in words is "twenty-eight million, one hundred four thousand, six hundred eighty-eight".