1812898404 has 36 divisors (see below), whose sum is σ = 4689180496. Its totient is φ = 590245488.

The previous prime is 1812898403. The next prime is 1812898421. The reversal of 1812898404 is 4048982181.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1812898404.

It is not an unprimeable number, because it can be changed into a prime (1812898403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 584014 + ... + 587109.

Almost surely, 2^1812898404 is an apocalyptic number.

It is an amenable number.

1812898404 is an abundant number, since it is smaller than the sum of its proper divisors (2876282092).

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

1812898404 is a wasteful number, since it uses less digits than its factorization.

1812898404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1171176 (or 1171171 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 45.

The square root of 1812898404 is about 42578.1446754083. The cubic root of 1812898404 is about 1219.3390677877.

The spelling of 1812898404 in words is "one billion, eight hundred twelve million, eight hundred ninety-eight thousand, four hundred four".