28577128 has 16 divisors (see below), whose sum is σ = 54722880. Its totient is φ = 13984368.

The previous prime is 28577113. The next prime is 28577137. The reversal of 28577128 is 82177582.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 37626 + ... + 38377.

It is an arithmetic number, because the mean of its divisors is an integer number (3420180).

Almost surely, 2^28577128 is an apocalyptic number.

It is an amenable number.

28577128 is a deficient number, since it is larger than the sum of its proper divisors (26145752).

28577128 is a wasteful number, since it uses less digits than its factorization.

28577128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76056 (or 76052 counting only the distinct ones).

The product of its digits is 62720, while the sum is 40.

The square root of 28577128 is about 5345.7579443892. The cubic root of 28577128 is about 305.7310351054.

The spelling of 28577128 in words is "twenty-eight million, five hundred seventy-seven thousand, one hundred twenty-eight".