28686304 has 12 divisors (see below), whose sum is σ = 56476224. Its totient is φ = 14343136.

The previous prime is 28686271. The next prime is 28686367. The reversal of 28686304 is 40368682.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 448192 + ... + 448255.

It is an arithmetic number, because the mean of its divisors is an integer number (4706352).

Almost surely, 2^28686304 is an apocalyptic number.

It is an amenable number.

28686304 is a deficient number, since it is larger than the sum of its proper divisors (27789920).

28686304 is an equidigital number, since it uses as much as digits as its factorization.

28686304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896457 (or 896449 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 28686304 is about 5355.9596712447. The cubic root of 28686304 is about 306.1198784152.

The spelling of 28686304 in words is "twenty-eight million, six hundred eighty-six thousand, three hundred four".