28332565 has 16 divisors (see below), whose sum is σ = 36128880. Its totient is φ = 21288960.

The previous prime is 28332547. The next prime is 28332589. The reversal of 28332565 is 56523382.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 40804 + 28291761 = 202^2 + 5319^2 .

It is not a de Polignac number, because 28332565 - 2⁵ = 28332533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28332565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2725 + ... + 8005.

It is an arithmetic number, because the mean of its divisors is an integer number (2258055).

Almost surely, 2^28332565 is an apocalyptic number.

It is an amenable number.

28332565 is a deficient number, since it is larger than the sum of its proper divisors (7796315).

28332565 is a wasteful number, since it uses less digits than its factorization.

28332565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5352.

The product of its digits is 43200, while the sum is 34.

The square root of 28332565 is about 5322.8343013849. The cubic root of 28332565 is about 304.8563867466.

The spelling of 28332565 in words is "twenty-eight million, three hundred thirty-two thousand, five hundred sixty-five".