28544836 has 12 divisors (see below), whose sum is σ = 52892028. Its totient is φ = 13432832.

The previous prime is 28544807. The next prime is 28544837. The reversal of 28544836 is 63844582.

It can be written as a sum of positive squares in 2 ways, for example, as 25100100 + 3444736 = 5010^2 + 1856^2 .

It is not an unprimeable number, because it can be changed into a prime (28544837) 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 3 ways as a sum of consecutive naturals, for example, 209821 + ... + 209956.

It is an arithmetic number, because the mean of its divisors is an integer number (4407669).

Almost surely, 2^28544836 is an apocalyptic number.

It is an amenable number.

28544836 is a deficient number, since it is larger than the sum of its proper divisors (24347192).

28544836 is a wasteful number, since it uses less digits than its factorization.

28544836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419798 (or 419796 counting only the distinct ones).

The product of its digits is 184320, while the sum is 40.

The square root of 28544836 is about 5342.7367518904. The cubic root of 28544836 is about 305.6158335637.

The spelling of 28544836 in words is "twenty-eight million, five hundred forty-four thousand, eight hundred thirty-six".