28605017 has 4 divisors (see below), whose sum is σ = 32691456. Its totient is φ = 24518580.

The previous prime is 28605007. The next prime is 28605023. The reversal of 28605017 is 71050682.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28605017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28605007) 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, 2043209 + ... + 2043222.

It is an arithmetic number, because the mean of its divisors is an integer number (8172864).

Almost surely, 2^28605017 is an apocalyptic number.

It is an amenable number.

28605017 is a deficient number, since it is larger than the sum of its proper divisors (4086439).

28605017 is an equidigital number, since it uses as much as digits as its factorization.

28605017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4086438.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 28605017 is about 5348.3658251844. The cubic root of 28605017 is about 305.8304591460.

Adding to 28605017 its reverse (71050682), we get a palindrome (99655699).

The spelling of 28605017 in words is "twenty-eight million, six hundred five thousand, seventeen".