1800816404 has 24 divisors (see below), whose sum is σ = 3213665280. Its totient is φ = 882655904.

The previous prime is 1800816403. The next prime is 1800816427. The reversal of 1800816404 is 4046180081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1800816401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302117 + ... + 308019.

It is an arithmetic number, because the mean of its divisors is an integer number (133902720).

Almost surely, 2^1800816404 is an apocalyptic number.

It is an amenable number.

1800816404 is a deficient number, since it is larger than the sum of its proper divisors (1412848876).

1800816404 is a wasteful number, since it uses less digits than its factorization.

1800816404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7399 (or 7397 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 1800816404 is about 42436.0271938833. The cubic root of 1800816404 is about 1216.6242799854.

Adding to 1800816404 its reverse (4046180081), we get a palindrome (5846996485).

The spelling of 1800816404 in words is "one billion, eight hundred million, eight hundred sixteen thousand, four hundred four".