28788804 has 72 divisors (see below), whose sum is σ = 82076960. Its totient is φ = 8719920.

The previous prime is 28788787. The next prime is 28788827. The reversal of 28788804 is 40888782.

It is a self number, because there is not a number n which added to its sum of digits gives 28788804.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11967 + ... + 14169.

Almost surely, 2^28788804 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28788804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41038480).

28788804 is an abundant number, since it is smaller than the sum of its proper divisors (53288156).

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

28788804 is a wasteful number, since it uses less digits than its factorization.

28788804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2238 (or 2219 counting only the distinct ones).

The product of its (nonzero) digits is 229376, while the sum is 45.

The square root of 28788804 is about 5365.5199188895. The cubic root of 28788804 is about 306.4840474370.

It can be divided in two parts, 28788 and 804, that added together give a palindrome (29592).

The spelling of 28788804 in words is "twenty-eight million, seven hundred eighty-eight thousand, eight hundred four".