2185884 has 18 divisors (see below), whose sum is σ = 5525520. Its totient is φ = 728616.

The previous prime is 2185873. The next prime is 2185889. The reversal of 2185884 is 4885812.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-3 number, since 3×2185884³ = 31333043978504661312, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 60719 = 2185884 / (2 + 1 + 8 + 5 + 8 + 8 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2185889) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30324 + ... + 30395.

2^2185884 is an apocalyptic number.

It is an amenable number.

2185884 is an abundant number, since it is smaller than the sum of its proper divisors (3339636).

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

2185884 is a wasteful number, since it uses less digits than its factorization.

2185884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60729 (or 60724 counting only the distinct ones).

The product of its digits is 20480, while the sum is 36.

The square root of 2185884 is about 1478.4735371321. The cubic root of 2185884 is about 129.7803786888.

It can be divided in two parts, 21 and 85884, that added together give a triangular number (85905 = T₄₁₄).

The spelling of 2185884 in words is "two million, one hundred eighty-five thousand, eight hundred eighty-four".