2640867 has 16 divisors (see below), whose sum is σ = 3749760. Its totient is φ = 1648512.

The previous prime is 2640863. The next prime is 2640871. The reversal of 2640867 is 7680462.

2640867 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2640863) and next prime (2640871).

It is not a de Polignac number, because 2640867 - 2² = 2640863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2640863) by changing a digit.

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, 5883 + ... + 6315.

It is an arithmetic number, because the mean of its divisors is an integer number (234360).

2^2640867 is an apocalyptic number.

2640867 is a deficient number, since it is larger than the sum of its proper divisors (1108893).

2640867 is a wasteful number, since it uses less digits than its factorization.

2640867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 2640867 is about 1625.0744598325. The cubic root of 2640867 is about 138.2235925830.

The spelling of 2640867 in words is "two million, six hundred forty thousand, eight hundred sixty-seven".