28644528 has 40 divisors (see below), whose sum is σ = 80726976. Its totient is φ = 8680000.

The previous prime is 28644523. The next prime is 28644557. The reversal of 28644528 is 82544682.

It is not an unprimeable number, because it can be changed into a prime (28644523) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 26598 + ... + 27653.

Almost surely, 2^28644528 is an apocalyptic number.

It is an amenable number.

28644528 is an abundant number, since it is smaller than the sum of its proper divisors (52082448).

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

28644528 is a wasteful number, since it uses less digits than its factorization.

28644528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54273 (or 54267 counting only the distinct ones).

The product of its digits is 122880, while the sum is 39.

The square root of 28644528 is about 5352.0582956466. The cubic root of 28644528 is about 305.9712049456.

The spelling of 28644528 in words is "twenty-eight million, six hundred forty-four thousand, five hundred twenty-eight".