28560117 has 4 divisors (see below), whose sum is σ = 38080160. Its totient is φ = 19040076.

The previous prime is 28560113. The next prime is 28560137. The reversal of 28560117 is 71106582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 28560117 - 2² = 28560113 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 (28560113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4760017 + ... + 4760022.

It is an arithmetic number, because the mean of its divisors is an integer number (9520040).

Almost surely, 2^28560117 is an apocalyptic number.

It is an amenable number.

28560117 is a deficient number, since it is larger than the sum of its proper divisors (9520043).

28560117 is an equidigital number, since it uses as much as digits as its factorization.

28560117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9520042.

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 28560117 is about 5344.1666328811. The cubic root of 28560117 is about 305.6703592748.

Adding to 28560117 its reverse (71106582), we get a palindrome (99666699).

The spelling of 28560117 in words is "twenty-eight million, five hundred sixty thousand, one hundred seventeen".