1808117872 has 40 divisors (see below), whose sum is σ = 3870109440. Its totient is φ = 811462080.

The previous prime is 1808117827. The next prime is 1808117893. The reversal of 1808117872 is 2787118081.

It is a congruent number.

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, 51118 + ... + 78925.

It is an arithmetic number, because the mean of its divisors is an integer number (96752736).

Almost surely, 2^1808117872 is an apocalyptic number.

It is an amenable number.

1808117872 is an abundant number, since it is smaller than the sum of its proper divisors (2061991568).

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

1808117872 is a wasteful number, since it uses less digits than its factorization.

1808117872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130141 (or 130135 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 43.

The square root of 1808117872 is about 42521.9692864759. The cubic root of 1808117872 is about 1218.2663434656.

It can be divided in two parts, 18081 and 17872, that added together give a palindrome (35953).

The spelling of 1808117872 in words is "one billion, eight hundred eight million, one hundred seventeen thousand, eight hundred seventy-two".