2138944 has 28 divisors (see below), whose sum is σ = 4470400. Its totient is φ = 1012608.

The previous prime is 2138909. The next prime is 2138971. The reversal of 2138944 is 4498312.

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, 337 + ... + 2095.

2^2138944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2138944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2235200).

2138944 is an abundant number, since it is smaller than the sum of its proper divisors (2331456).

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

2138944 is a wasteful number, since it uses less digits than its factorization.

2138944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1790 (or 1780 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

The square root of 2138944 is about 1462.5129059260. The cubic root of 2138944 is about 128.8446741369.

The spelling of 2138944 in words is "two million, one hundred thirty-eight thousand, nine hundred forty-four".