28768528 has 10 divisors (see below), whose sum is σ = 55739054. Its totient is φ = 14384256.

The previous prime is 28768513. The next prime is 28768529. The reversal of 28768528 is 82586782.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15460624 + 13307904 = 3932^2 + 3648^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28768529) 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 as a sum of consecutive naturals, namely, 899001 + ... + 899032.

Almost surely, 2^28768528 is an apocalyptic number.

It is an amenable number.

28768528 is a deficient number, since it is larger than the sum of its proper divisors (26970526).

28768528 is a wasteful number, since it uses less digits than its factorization.

28768528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798041 (or 1798035 counting only the distinct ones).

The product of its digits is 430080, while the sum is 46.

The square root of 28768528 is about 5363.6301140179. The cubic root of 28768528 is about 306.4120781392.

The spelling of 28768528 in words is "twenty-eight million, seven hundred sixty-eight thousand, five hundred twenty-eight".