2106804 has 36 divisors (see below), whose sum is σ = 5720064. Its totient is φ = 601776.

The previous prime is 2106781. The next prime is 2106809. The reversal of 2106804 is 4086012.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2106809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1204 + ... + 2379.

2^2106804 is an apocalyptic number.

It is an amenable number.

2106804 is an abundant number, since it is smaller than the sum of its proper divisors (3613260).

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

2106804 is a wasteful number, since it uses less digits than its factorization.

2106804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3604 (or 3595 counting only the distinct ones).

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

The square root of 2106804 is about 1451.4833791677. The cubic root of 2106804 is about 128.1960699501.

The spelling of 2106804 in words is "two million, one hundred six thousand, eight hundred four".