2185944 has 16 divisors (see below), whose sum is σ = 5464920. Its totient is φ = 728640.

The previous prime is 2185921. The next prime is 2185949. The reversal of 2185944 is 4495812.

It is a super-2 number, since 2×2185944² = 9556702342272, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2185949) 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, 45517 + ... + 45564.

2^2185944 is an apocalyptic number.

2185944 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2185944 is an abundant number, since it is smaller than the sum of its proper divisors (3278976).

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

2185944 is a wasteful number, since it uses less digits than its factorization.

2185944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91090 (or 91086 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 2185944 is about 1478.4938281914. The cubic root of 2185944 is about 129.7815661186.

The spelling of 2185944 in words is "two million, one hundred eighty-five thousand, nine hundred forty-four".