28252617 has 4 divisors (see below), whose sum is σ = 37670160. Its totient is φ = 18835076.

The previous prime is 28252613. The next prime is 28252661. The reversal of 28252617 is 71625282.

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 not a de Polignac number, because 28252617 - 2² = 28252613 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28252613) 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, 4708767 + ... + 4708772.

It is an arithmetic number, because the mean of its divisors is an integer number (9417540).

Almost surely, 2^28252617 is an apocalyptic number.

It is an amenable number.

28252617 is a deficient number, since it is larger than the sum of its proper divisors (9417543).

28252617 is an equidigital number, since it uses as much as digits as its factorization.

28252617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9417542.

The product of its digits is 13440, while the sum is 33.

The square root of 28252617 is about 5315.3190873173. The cubic root of 28252617 is about 304.5693716799.

Adding to 28252617 its reverse (71625282), we get a palindrome (99877899).

The spelling of 28252617 in words is "twenty-eight million, two hundred fifty-two thousand, six hundred seventeen".