28784264 has 32 divisors (see below), whose sum is σ = 57681720. Its totient is φ = 13418496.

The previous prime is 28784263. The next prime is 28784279. The reversal of 28784264 is 46248782.

It can be written as a sum of positive squares in 4 ways, for example, as 11628100 + 17156164 = 3410^2 + 4142^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28784263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14432 + ... + 16304.

Almost surely, 2^28784264 is an apocalyptic number.

It is an amenable number.

28784264 is an abundant number, since it is smaller than the sum of its proper divisors (28897456).

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

28784264 is a wasteful number, since it uses less digits than its factorization.

28784264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2009 (or 2005 counting only the distinct ones).

The product of its digits is 172032, while the sum is 41.

The square root of 28784264 is about 5365.0968304402. The cubic root of 28784264 is about 306.4679357253.

The spelling of 28784264 in words is "twenty-eight million, seven hundred eighty-four thousand, two hundred sixty-four".