28087508 has 24 divisors (see below), whose sum is σ = 51632448. Its totient is φ = 13343616.

The previous prime is 28087487. The next prime is 28087513. The reversal of 28087508 is 80578082.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14060 + ... + 15932.

It is an arithmetic number, because the mean of its divisors is an integer number (2151352).

Almost surely, 2^28087508 is an apocalyptic number.

It is an amenable number.

28087508 is a deficient number, since it is larger than the sum of its proper divisors (23544940).

28087508 is a wasteful number, since it uses less digits than its factorization.

28087508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2063 (or 2061 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 38.

The square root of 28087508 is about 5299.7649004461. The cubic root of 28087508 is about 303.9749084785.

The spelling of 28087508 in words is "twenty-eight million, eighty-seven thousand, five hundred eight".