28560879 has 12 divisors (see below), whose sum is σ = 41360800. Its totient is φ = 18991584.

The previous prime is 28560869. The next prime is 28560893. The reversal of 28560879 is 97806582.

28560879 is a `hidden beast` number, since 2 + 8 + 560 + 87 + 9 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-28560879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28560839) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 199 + ... + 7560.

Almost surely, 2^28560879 is an apocalyptic number.

28560879 is a deficient number, since it is larger than the sum of its proper divisors (12799921).

28560879 is a wasteful number, since it uses less digits than its factorization.

28560879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8174 (or 8171 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 28560879 is about 5344.2379250928. The cubic root of 28560879 is about 305.6730777364.

The spelling of 28560879 in words is "twenty-eight million, five hundred sixty thousand, eight hundred seventy-nine".