28622565 has 40 divisors (see below), whose sum is σ = 53099640. Its totient is φ = 14732928.

The previous prime is 28622549. The next prime is 28622591. The reversal of 28622565 is 56522682.

28622565 is a `hidden beast` number, since 28 + 622 + 5 + 6 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 9253764 + 19368801 = 3042^2 + 4401^2 .

It is not a de Polignac number, because 28622565 - 2⁴ = 28622549 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 10527 + ... + 12963.

It is an arithmetic number, because the mean of its divisors is an integer number (1327491).

Almost surely, 2^28622565 is an apocalyptic number.

It is an amenable number.

28622565 is a deficient number, since it is larger than the sum of its proper divisors (24477075).

28622565 is a wasteful number, since it uses less digits than its factorization.

28622565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2483 (or 2474 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 28622565 is about 5350.0060747629. The cubic root of 28622565 is about 305.8929844931.

The spelling of 28622565 in words is "twenty-eight million, six hundred twenty-two thousand, five hundred sixty-five".