28608784 has 20 divisors (see below), whose sum is σ = 57218560. Its totient is φ = 13842720.

The previous prime is 28608779. The next prime is 28608787. The reversal of 28608784 is 48780682.

28608784 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 28608784.

It is not an unprimeable number, because it can be changed into a prime (28608787) 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, 28344 + ... + 29335.

It is an arithmetic number, because the mean of its divisors is an integer number (2860928).

Almost surely, 2^28608784 is an apocalyptic number.

It is an amenable number.

28608784 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.

28608784 is a wasteful number, since it uses less digits than its factorization.

28608784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57718 (or 57712 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 28608784 is about 5348.7179772353. The cubic root of 28608784 is about 305.8438835134.

It can be divided in two parts, 28608 and 784, that added together give a palindrome (29392).

The spelling of 28608784 in words is "twenty-eight million, six hundred eight thousand, seven hundred eighty-four".