28527565 has 24 divisors (see below), whose sum is σ = 38294424. Its totient is φ = 20380800.

The previous prime is 28527563. The next prime is 28527571. The reversal of 28527565 is 56572582.

It can be written as a sum of positive squares in 4 ways, for example, as 1684804 + 26842761 = 1298^2 + 5181^2 .

It is not a de Polignac number, because 28527565 - 2¹ = 28527563 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28527563) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36519 + ... + 37291.

It is an arithmetic number, because the mean of its divisors is an integer number (1595601).

Almost surely, 2^28527565 is an apocalyptic number.

It is an amenable number.

28527565 is a deficient number, since it is larger than the sum of its proper divisors (9766859).

28527565 is a wasteful number, since it uses less digits than its factorization.

28527565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861 (or 850 counting only the distinct ones).

The product of its digits is 168000, while the sum is 40.

The square root of 28527565 is about 5341.1202008567. The cubic root of 28527565 is about 305.5541836975.

It can be divided in two parts, 28527 and 565, that added together give a palindrome (29092).

The spelling of 28527565 in words is "twenty-eight million, five hundred twenty-seven thousand, five hundred sixty-five".