28957565 has 32 divisors (see below), whose sum is σ = 44169216. Its totient is φ = 17729280.

The previous prime is 28957561. The next prime is 28957637. The reversal of 28957565 is 56575982.

It is not a de Polignac number, because 28957565 - 2² = 28957561 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28957561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13079 + ... + 15131.

It is an arithmetic number, because the mean of its divisors is an integer number (1380288).

Almost surely, 2^28957565 is an apocalyptic number.

It is an amenable number.

28957565 is a deficient number, since it is larger than the sum of its proper divisors (15211651).

28957565 is a wasteful number, since it uses less digits than its factorization.

28957565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2109.

The product of its digits is 756000, while the sum is 47.

The square root of 28957565 is about 5381.2233739179. The cubic root of 28957565 is about 307.0817545144.

The spelling of 28957565 in words is "twenty-eight million, nine hundred fifty-seven thousand, five hundred sixty-five".