28552617 has 12 divisors (see below), whose sum is σ = 42665220. Its totient is φ = 18378528.

The previous prime is 28552607. The next prime is 28552619. The reversal of 28552617 is 71625582.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 22382361 + 6170256 = 4731^2 + 2484^2 .

It is not a de Polignac number, because 28552617 - 2⁶ = 28552553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28552619) 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, 54438 + ... + 54959.

It is an arithmetic number, because the mean of its divisors is an integer number (3555435).

Almost surely, 2^28552617 is an apocalyptic number.

It is an amenable number.

28552617 is a deficient number, since it is larger than the sum of its proper divisors (14112603).

28552617 is a wasteful number, since it uses less digits than its factorization.

28552617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109432 (or 109429 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 28552617 is about 5343.4648871308. The cubic root of 28552617 is about 305.6436001828.

The spelling of 28552617 in words is "twenty-eight million, five hundred fifty-two thousand, six hundred seventeen".