1811804 has 12 divisors (see below), whose sum is σ = 3280200. Its totient is φ = 874608.

The previous prime is 1811791. The next prime is 1811819. The reversal of 1811804 is 4081181.

It is a self number, because there is not a number n which added to its sum of digits gives 1811804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7694 + ... + 7925.

It is an arithmetic number, because the mean of its divisors is an integer number (273350).

2^1811804 is an apocalyptic number.

It is an amenable number.

1811804 is a deficient number, since it is larger than the sum of its proper divisors (1468396).

1811804 is a wasteful number, since it uses less digits than its factorization.

1811804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15652 (or 15650 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 23.

The square root of 1811804 is about 1346.0326890533. The cubic root of 1811804 is about 121.9093656321.

Adding to 1811804 its reverse (4081181), we get a palindrome (5892985).

The spelling of 1811804 in words is "one million, eight hundred eleven thousand, eight hundred four".