28532864 has 16 divisors (see below), whose sum is σ = 56843070. Its totient is φ = 14266368.

The previous prime is 28532837. The next prime is 28532869. The reversal of 28532864 is 46823582.

It can be written as a sum of positive squares in only one way, i.e., 22963264 + 5569600 = 4792^2 + 2360^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28532869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111329 + ... + 111584.

Almost surely, 2^28532864 is an apocalyptic number.

It is an amenable number.

28532864 is a deficient number, since it is larger than the sum of its proper divisors (28310206).

28532864 is an equidigital number, since it uses as much as digits as its factorization.

28532864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222927 (or 222915 counting only the distinct ones).

The product of its digits is 92160, while the sum is 38.

The square root of 28532864 is about 5341.6162348113. The cubic root of 28532864 is about 305.5731014400.

The spelling of 28532864 in words is "twenty-eight million, five hundred thirty-two thousand, eight hundred sixty-four".