2638867 has 16 divisors (see below), whose sum is σ = 3370752. Its totient is φ = 2005920.

The previous prime is 2638849. The next prime is 2638873. The reversal of 2638867 is 7688362.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-2638867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2638897) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2913 + ... + 3709.

It is an arithmetic number, because the mean of its divisors is an integer number (210672).

2^2638867 is an apocalyptic number.

2638867 is a deficient number, since it is larger than the sum of its proper divisors (731885).

2638867 is a wasteful number, since it uses less digits than its factorization.

2638867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858.

The product of its digits is 96768, while the sum is 40.

The square root of 2638867 is about 1624.4589868630. The cubic root of 2638867 is about 138.1886902824.

The spelling of 2638867 in words is "two million, six hundred thirty-eight thousand, eight hundred sixty-seven".