2186004 has 12 divisors (see below), whose sum is σ = 5100704. Its totient is φ = 728664.

The previous prime is 2186003. The next prime is 2186011. The reversal of 2186004 is 4006812.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×2186004² = 9557226976032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2186003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91072 + ... + 91095.

2^2186004 is an apocalyptic number.

It is an amenable number.

2186004 is an abundant number, since it is smaller than the sum of its proper divisors (2914700).

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

2186004 is a wasteful number, since it uses less digits than its factorization.

2186004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182174 (or 182172 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 2186004 is about 1478.5141189722. The cubic root of 2186004 is about 129.7827535267.

The spelling of 2186004 in words is "two million, one hundred eighty-six thousand, four".