2186604 has 36 divisors (see below), whose sum is σ = 6317584. Its totient is φ = 624672.

The previous prime is 2186603. The next prime is 2186617. The reversal of 2186604 is 4066812.

Added to its reverse (4066812) it gives a triangular number (6253416 = T₃₅₃₆).

2186604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (2186603) 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 11 ways as a sum of consecutive naturals, for example, 4087 + ... + 4590.

2^2186604 is an apocalyptic number.

It is an amenable number.

2186604 is an abundant number, since it is smaller than the sum of its proper divisors (4130980).

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

2186604 is a wasteful number, since it uses less digits than its factorization.

2186604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8694 (or 8689 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 2186604 is about 1478.7170114664. The cubic root of 2186604 is about 129.7946264126.

Adding to 2186604 its reverse (4066812), we get a triangular number (6253416 = T₃₅₃₆).

The spelling of 2186604 in words is "two million, one hundred eighty-six thousand, six hundred four".