28568517 has 24 divisors (see below), whose sum is σ = 41054496. Its totient is φ = 17664768.

The previous prime is 28568503. The next prime is 28568543. The reversal of 28568517 is 71586582.

It is not a de Polignac number, because 28568517 - 2⁸ = 28568261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28568597) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71763 + ... + 72159.

It is an arithmetic number, because the mean of its divisors is an integer number (1710604).

Almost surely, 2^28568517 is an apocalyptic number.

It is an amenable number.

28568517 is a deficient number, since it is larger than the sum of its proper divisors (12485979).

28568517 is a wasteful number, since it uses less digits than its factorization.

28568517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517 (or 500 counting only the distinct ones).

The product of its digits is 134400, while the sum is 42.

The square root of 28568517 is about 5344.9524787410. The cubic root of 28568517 is about 305.7003238969.

The spelling of 28568517 in words is "twenty-eight million, five hundred sixty-eight thousand, five hundred seventeen".