2638164 has 12 divisors (see below), whose sum is σ = 6155744. Its totient is φ = 879384.

The previous prime is 2638087. The next prime is 2638177. The reversal of 2638164 is 4618362.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent 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, 109912 + ... + 109935.

2^2638164 is an apocalyptic number.

It is an amenable number.

2638164 is an abundant number, since it is smaller than the sum of its proper divisors (3517580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2638164 is a wasteful number, since it uses less digits than its factorization.

2638164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219854 (or 219852 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 2638164 is about 1624.2425927182. The cubic root of 2638164 is about 138.1764179351.

The spelling of 2638164 in words is "two million, six hundred thirty-eight thousand, one hundred sixty-four".