28087605 has 96 divisors (see below), whose sum is σ = 63248640. Its totient is φ = 11228544.

The previous prime is 28087597. The next prime is 28087639. The reversal of 28087605 is 50678082.

It is not a de Polignac number, because 28087605 - 2³ = 28087597 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28087605.

It is a congruent number.

It is an unprimeable number.

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 in 95 ways as a sum of consecutive naturals, for example, 1478286 + ... + 1478304.

It is an arithmetic number, because the mean of its divisors is an integer number (658840).

Almost surely, 2^28087605 is an apocalyptic number.

It is an amenable number.

28087605 is an abundant number, since it is smaller than the sum of its proper divisors (35161035).

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

28087605 is a wasteful number, since it uses less digits than its factorization.

28087605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 28087605 is about 5299.7740517875. The cubic root of 28087605 is about 303.9752584031.

The spelling of 28087605 in words is "twenty-eight million, eighty-seven thousand, six hundred five".