2158844 has 6 divisors (see below), whose sum is σ = 3777984. Its totient is φ = 1079420.

The previous prime is 2158843. The next prime is 2158859. The reversal of 2158844 is 4488512.

It is a happy number.

2158844 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2158844.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158841) 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, 269852 + ... + 269859.

It is an arithmetic number, because the mean of its divisors is an integer number (629664).

2^2158844 is an apocalyptic number.

It is an amenable number.

2158844 is a deficient number, since it is larger than the sum of its proper divisors (1619140).

2158844 is a wasteful number, since it uses less digits than its factorization.

2158844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539715 (or 539713 counting only the distinct ones).

The product of its digits is 10240, while the sum is 32.

The square root of 2158844 is about 1469.3005138500. The cubic root of 2158844 is about 129.2430168563.

The spelling of 2158844 in words is "two million, one hundred fifty-eight thousand, eight hundred forty-four".