2138772 has 12 divisors (see below), whose sum is σ = 4990496. Its totient is φ = 712920.

The previous prime is 2138749. The next prime is 2138789. The reversal of 2138772 is 2778312.

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, 89104 + ... + 89127.

2^2138772 is an apocalyptic number.

It is an amenable number.

2138772 is an abundant number, since it is smaller than the sum of its proper divisors (2851724).

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

2138772 is a wasteful number, since it uses less digits than its factorization.

2138772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178238 (or 178236 counting only the distinct ones).

The product of its digits is 4704, while the sum is 30.

The square root of 2138772 is about 1462.4541018439. The cubic root of 2138772 is about 128.8412204267.

The spelling of 2138772 in words is "two million, one hundred thirty-eight thousand, seven hundred seventy-two".