1811604804 has 24 divisors (see below), whose sum is σ = 4341324288. Its totient is φ = 587547360.

The previous prime is 1811604797. The next prime is 1811604859. The reversal of 1811604804 is 4084061181.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2039652 + ... + 2040539.

It is an arithmetic number, because the mean of its divisors is an integer number (180888512).

Almost surely, 2^1811604804 is an apocalyptic number.

It is an amenable number.

1811604804 is an abundant number, since it is smaller than the sum of its proper divisors (2529719484).

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

1811604804 is a wasteful number, since it uses less digits than its factorization.

1811604804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4080235 (or 4080233 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 1811604804 is about 42562.9510724997. The cubic root of 1811604804 is about 1219.0489775590.

Adding to 1811604804 its reverse (4084061181), we get a palindrome (5895665985).

The spelling of 1811604804 in words is "one billion, eight hundred eleven million, six hundred four thousand, eight hundred four".