2138964 has 12 divisors (see below), whose sum is σ = 4990944. Its totient is φ = 712984.

The previous prime is 2138909. The next prime is 2138971. The reversal of 2138964 is 4698312.

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

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89112 + ... + 89135.

It is an arithmetic number, because the mean of its divisors is an integer number (415912).

2^2138964 is an apocalyptic number.

It is an amenable number.

2138964 is an abundant number, since it is smaller than the sum of its proper divisors (2851980).

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

2138964 is a wasteful number, since it uses less digits than its factorization.

2138964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178254 (or 178252 counting only the distinct ones).

The product of its digits is 10368, while the sum is 33.

The square root of 2138964 is about 1462.5197434565. The cubic root of 2138964 is about 128.8450757191.

The spelling of 2138964 in words is "two million, one hundred thirty-eight thousand, nine hundred sixty-four".