2172844 has 12 divisors (see below), whose sum is σ = 3820824. Its totient is φ = 1081184.

The previous prime is 2172839. The next prime is 2172847. The reversal of 2172844 is 4482712.

2172844 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2172847) 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, 289 + ... + 2104.

It is an arithmetic number, because the mean of its divisors is an integer number (318402).

2^2172844 is an apocalyptic number.

It is an amenable number.

2172844 is a deficient number, since it is larger than the sum of its proper divisors (1647980).

2172844 is a wasteful number, since it uses less digits than its factorization.

2172844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2624 (or 2622 counting only the distinct ones).

The product of its digits is 3584, while the sum is 28.

The square root of 2172844 is about 1474.0569866867. The cubic root of 2172844 is about 129.5217933637.

The spelling of 2172844 in words is "two million, one hundred seventy-two thousand, eight hundred forty-four".