180730865 has 24 divisors (see below), whose sum is σ = 256582080. Its totient is φ = 121819488.

The previous prime is 180730841. The next prime is 180730867. The reversal of 180730865 is 568037081.

It is not a de Polignac number, because 180730865 - 2¹⁴ = 180714481 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (180730867) 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 23 ways as a sum of consecutive naturals, for example, 8204 + ... + 20706.

It is an arithmetic number, because the mean of its divisors is an integer number (10690920).

Almost surely, 2^180730865 is an apocalyptic number.

It is an amenable number.

180730865 is a deficient number, since it is larger than the sum of its proper divisors (75851215).

180730865 is a wasteful number, since it uses less digits than its factorization.

180730865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12581 (or 12574 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 180730865 is about 13443.6180026063. The cubic root of 180730865 is about 565.3847745799.

The spelling of 180730865 in words is "one hundred eighty million, seven hundred thirty thousand, eight hundred sixty-five".