1813804 has 6 divisors (see below), whose sum is σ = 3174164. Its totient is φ = 906900.

The previous prime is 1813793. The next prime is 1813813. The reversal of 1813804 is 4083181.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 226722 + ... + 226729.

2^1813804 is an apocalyptic number.

It is an amenable number.

1813804 is a deficient number, since it is larger than the sum of its proper divisors (1360360).

1813804 is a wasteful number, since it uses less digits than its factorization.

1813804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453455 (or 453453 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 1813804 is about 1346.7754081509. The cubic root of 1813804 is about 121.9542065883.

Adding to 1813804 its reverse (4083181), we get a palindrome (5896985).

The spelling of 1813804 in words is "one million, eight hundred thirteen thousand, eight hundred four".