2628565 has 4 divisors (see below), whose sum is σ = 3154284. Its totient is φ = 2102848.

The previous prime is 2628559. The next prime is 2628581. The reversal of 2628565 is 5658262.

2628565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1656369 + 972196 = 1287^2 + 986^2 .

It is a cyclic number.

It is not a de Polignac number, because 2628565 - 2⁵ = 2628533 is a prime.

It is a Duffinian number.

2628565 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2628565.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 262852 + ... + 262861.

It is an arithmetic number, because the mean of its divisors is an integer number (788571).

2^2628565 is an apocalyptic number.

It is an amenable number.

2628565 is a deficient number, since it is larger than the sum of its proper divisors (525719).

2628565 is an equidigital number, since it uses as much as digits as its factorization.

2628565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525718.

The product of its digits is 28800, while the sum is 34.

The square root of 2628565 is about 1621.2849842023. The cubic root of 2628565 is about 138.0086286000.

The spelling of 2628565 in words is "two million, six hundred twenty-eight thousand, five hundred sixty-five".