2181884 has 18 divisors (see below), whose sum is σ = 4032504. Its totient is φ = 1032840.

The previous prime is 2181871. The next prime is 2181889. The reversal of 2181884 is 4881812.

2181884 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 2181884.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181889) 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 in 5 ways as a sum of consecutive naturals, for example, 689 + ... + 2199.

It is an arithmetic number, because the mean of its divisors is an integer number (224028).

2^2181884 is an apocalyptic number.

It is an amenable number.

2181884 is a deficient number, since it is larger than the sum of its proper divisors (1850620).

2181884 is a wasteful number, since it uses less digits than its factorization.

2181884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1553 (or 1532 counting only the distinct ones).

The product of its digits is 4096, while the sum is 32.

The square root of 2181884 is about 1477.1201711438. The cubic root of 2181884 is about 129.7011676407.

The spelling of 2181884 in words is "two million, one hundred eighty-one thousand, eight hundred eighty-four".