1812105904 has 40 divisors (see below), whose sum is σ = 4014885888. Its totient is φ = 776159040.

The previous prime is 1812105863. The next prime is 1812105913. The reversal of 1812105904 is 4095012181.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243519 + ... + 250849.

Almost surely, 2^1812105904 is an apocalyptic number.

1812105904 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1812105904 is an abundant number, since it is smaller than the sum of its proper divisors (2202779984).

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

1812105904 is a wasteful number, since it uses less digits than its factorization.

1812105904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9553 (or 9547 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 1812105904 is about 42568.8372404039. The cubic root of 1812105904 is about 1219.1613657809.

The spelling of 1812105904 in words is "one billion, eight hundred twelve million, one hundred five thousand, nine hundred four".