2628865 has 4 divisors (see below), whose sum is σ = 3154644. Its totient is φ = 2103088.

The previous prime is 2628839. The next prime is 2628889. The reversal of 2628865 is 5688262.

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 1896129 + 732736 = 1377^2 + 856^2 .

It is a cyclic number.

It is not a de Polignac number, because 2628865 - 2⁵ = 2628833 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 262882 + ... + 262891.

It is an arithmetic number, because the mean of its divisors is an integer number (788661).

2^2628865 is an apocalyptic number.

It is an amenable number.

2628865 is a deficient number, since it is larger than the sum of its proper divisors (525779).

2628865 is an equidigital number, since it uses as much as digits as its factorization.

2628865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525778.

The product of its digits is 46080, while the sum is 37.

The square root of 2628865 is about 1621.3775007690. The cubic root of 2628865 is about 138.0138787414.

The spelling of 2628865 in words is "two million, six hundred twenty-eight thousand, eight hundred sixty-five".