28352565 has 16 divisors (see below), whose sum is σ = 50404800. Its totient is φ = 15121296.

The previous prime is 28352563. The next prime is 28352567. The reversal of 28352565 is 56525382.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28352563) and next prime (28352567).

It is not a de Polignac number, because 28352565 - 2¹ = 28352563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28352563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104875 + ... + 105144.

It is an arithmetic number, because the mean of its divisors is an integer number (3150300).

Almost surely, 2^28352565 is an apocalyptic number.

It is an amenable number.

28352565 is a deficient number, since it is larger than the sum of its proper divisors (22052235).

28352565 is a wasteful number, since it uses less digits than its factorization.

28352565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210033 (or 210027 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 28352565 is about 5324.7126683043. The cubic root of 28352565 is about 304.9281027342.

The spelling of 28352565 in words is "twenty-eight million, three hundred fifty-two thousand, five hundred sixty-five".