2138744 has 16 divisors (see below), whose sum is σ = 4059720. Its totient is φ = 1056160.

The previous prime is 2138743. The next prime is 2138749. The reversal of 2138744 is 4478312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 947 + ... + 2274.

2^2138744 is an apocalyptic number.

It is an amenable number.

2138744 is a deficient number, since it is larger than the sum of its proper divisors (1920976).

2138744 is a wasteful number, since it uses less digits than its factorization.

2138744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3310 (or 3306 counting only the distinct ones).

The product of its digits is 5376, while the sum is 29.

The square root of 2138744 is about 1462.4445288625. Note that the first 3 decimals coincide. The cubic root of 2138744 is about 128.8406581773.

It can be divided in two parts, 2138 and 744, that added together give a palindrome (2882).

The spelling of 2138744 in words is "two million, one hundred thirty-eight thousand, seven hundred forty-four".