2156444 has 6 divisors (see below), whose sum is σ = 3773784. Its totient is φ = 1078220.

The previous prime is 2156437. The next prime is 2156447. The reversal of 2156444 is 4446512.

2156444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269552 + ... + 269559.

It is an arithmetic number, because the mean of its divisors is an integer number (628964).

2^2156444 is an apocalyptic number.

It is an amenable number.

2156444 is a deficient number, since it is larger than the sum of its proper divisors (1617340).

2156444 is a wasteful number, since it uses less digits than its factorization.

2156444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539115 (or 539113 counting only the distinct ones).

The product of its digits is 3840, while the sum is 26.

The square root of 2156444 is about 1468.4835715799. The cubic root of 2156444 is about 129.1951056816.

It can be divided in two parts, 21 and 56444, that added together give a palindrome (56465).

The spelling of 2156444 in words is "two million, one hundred fifty-six thousand, four hundred forty-four".