2185844 has 6 divisors (see below), whose sum is σ = 3825234. Its totient is φ = 1092920.

The previous prime is 2185801. The next prime is 2185853. The reversal of 2185844 is 4485812.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2137444 + 48400 = 1462^2 + 220^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2185844.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 273227 + ... + 273234.

It is an arithmetic number, because the mean of its divisors is an integer number (637539).

2^2185844 is an apocalyptic number.

It is an amenable number.

2185844 is a deficient number, since it is larger than the sum of its proper divisors (1639390).

2185844 is a wasteful number, since it uses less digits than its factorization.

2185844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546465 (or 546463 counting only the distinct ones).

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

The square root of 2185844 is about 1478.4600096046. The cubic root of 2185844 is about 129.7795870568.

Subtracting from 2185844 its sum of digits (32), we obtain a palindrome (2185812).

Subtracting 2185844 from its reverse (4485812), we obtain a cube (2299968 = 132³).

The spelling of 2185844 in words is "two million, one hundred eighty-five thousand, eight hundred forty-four".