2161884 has 24 divisors (see below), whose sum is σ = 5071248. Its totient is φ = 716800.

The previous prime is 2161883. The next prime is 2161897. The reversal of 2161884 is 4881612.

It is an Ulam number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2734 + ... + 3434.

It is an arithmetic number, because the mean of its divisors is an integer number (211302).

2^2161884 is an apocalyptic number.

It is an amenable number.

2161884 is an abundant number, since it is smaller than the sum of its proper divisors (2909364).

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

2161884 is a wasteful number, since it uses less digits than its factorization.

2161884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965 (or 963 counting only the distinct ones).

The product of its digits is 3072, while the sum is 30.

The square root of 2161884 is about 1470.3346557842. The cubic root of 2161884 is about 129.3036533966.

The spelling of 2161884 in words is "two million, one hundred sixty-one thousand, eight hundred eighty-four".