1806804 has 36 divisors (see below), whose sum is σ = 4717440. Its totient is φ = 582480.

The previous prime is 1806803. The next prime is 1806839. The reversal of 1806804 is 4086081.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1806803) 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, 307 + ... + 1925.

It is an arithmetic number, because the mean of its divisors is an integer number (131040).

2^1806804 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1806804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2358720).

1806804 is an abundant number, since it is smaller than the sum of its proper divisors (2910636).

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

1806804 is a wasteful number, since it uses less digits than its factorization.

1806804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660 (or 1655 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 1806804 is about 1344.1740958670. The cubic root of 1806804 is about 121.7971186842.

The spelling of 1806804 in words is "one million, eight hundred six thousand, eight hundred four".