28087588 has 24 divisors (see below), whose sum is σ = 50819832. Its totient is φ = 13572864.

The previous prime is 28087571. The next prime is 28087589. The reversal of 28087588 is 88578082.

It can be written as a sum of positive squares in 4 ways, for example, as 13017664 + 15069924 = 3608^2 + 3882^2 .

It is not an unprimeable number, because it can be changed into a prime (28087589) 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, 25056 + ... + 26152.

It is an arithmetic number, because the mean of its divisors is an integer number (2117493).

Almost surely, 2^28087588 is an apocalyptic number.

It is an amenable number.

28087588 is a deficient number, since it is larger than the sum of its proper divisors (22732244).

28087588 is a wasteful number, since it uses less digits than its factorization.

28087588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311 (or 1309 counting only the distinct ones).

The product of its (nonzero) digits is 286720, while the sum is 46.

The square root of 28087588 is about 5299.7724479453. The cubic root of 28087588 is about 303.9751970761.

The spelling of 28087588 in words is "twenty-eight million, eighty-seven thousand, five hundred eighty-eight".