2640695 has 16 divisors (see below), whose sum is σ = 3431808. Its totient is φ = 1943040.

The previous prime is 2640689. The next prime is 2640707. The reversal of 2640695 is 5960462.

2640695 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2640695 - 2¹⁴ = 2624311 is a prime.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 3665 + ... + 4325.

It is an arithmetic number, because the mean of its divisors is an integer number (214488).

2^2640695 is an apocalyptic number.

2640695 is a deficient number, since it is larger than the sum of its proper divisors (791113).

2640695 is a wasteful number, since it uses less digits than its factorization.

2640695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 2640695 is about 1625.0215383188. The cubic root of 2640695 is about 138.2205916779.

The spelling of 2640695 in words is "two million, six hundred forty thousand, six hundred ninety-five".