1808905612 has 12 divisors (see below), whose sum is σ = 3167886736. Its totient is φ = 903795120.

The previous prime is 1808905573. The next prime is 1808905613. The reversal of 1808905612 is 2165098081.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1808905613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158208 + ... + 169255.

Almost surely, 2^1808905612 is an apocalyptic number.

It is an amenable number.

1808905612 is a deficient number, since it is larger than the sum of its proper divisors (1358981124).

1808905612 is a wasteful number, since it uses less digits than its factorization.

1808905612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328848 (or 328846 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 40.

The square root of 1808905612 is about 42531.2310190994. The cubic root of 1808905612 is about 1218.4432378689.

The spelling of 1808905612 in words is "one billion, eight hundred eight million, nine hundred five thousand, six hundred twelve".