1806904 has 16 divisors (see below), whose sum is σ = 3696120. Its totient is φ = 821280.

The previous prime is 1806901. The next prime is 1806941. The reversal of 1806904 is 4096081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1806901) 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, 10179 + ... + 10354.

2^1806904 is an apocalyptic number.

It is an amenable number.

1806904 is an abundant number, since it is smaller than the sum of its proper divisors (1889216).

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

1806904 is a wasteful number, since it uses less digits than its factorization.

1806904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20550 (or 20546 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1806904 is about 1344.2112929149. The cubic root of 1806904 is about 121.7993656513.

The spelling of 1806904 in words is "one million, eight hundred six thousand, nine hundred four".