2187944 has 48 divisors (see below), whose sum is σ = 4777920. Its totient is φ = 931040.

The previous prime is 2187943. The next prime is 2187953. The reversal of 2187944 is 4497812.

It is not an unprimeable number, because it can be changed into a prime (2187943) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46529 + ... + 46575.

It is an arithmetic number, because the mean of its divisors is an integer number (99540).

2^2187944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2187944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2388960).

2187944 is an abundant number, since it is smaller than the sum of its proper divisors (2589976).

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

2187944 is a wasteful number, since it uses less digits than its factorization.

2187944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 83 counting only the distinct ones).

The product of its digits is 16128, while the sum is 35.

The square root of 2187944 is about 1479.1700375548. The cubic root of 2187944 is about 129.8211346850.

The spelling of 2187944 in words is "two million, one hundred eighty-seven thousand, nine hundred forty-four".