180638844 has 24 divisors (see below), whose sum is σ = 423053568. Its totient is φ = 59989680.

The previous prime is 180638837. The next prime is 180638863. The reversal of 180638844 is 448836081.

180638844 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 180638796 and 180638805.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 24522 + ... + 31025.

It is an arithmetic number, because the mean of its divisors is an integer number (17627232).

Almost surely, 2^180638844 is an apocalyptic number.

It is an amenable number.

180638844 is an abundant number, since it is smaller than the sum of its proper divisors (242414724).

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

180638844 is a wasteful number, since it uses less digits than its factorization.

180638844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55825 (or 55823 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 42.

The square root of 180638844 is about 13440.1950878698. The cubic root of 180638844 is about 565.2888011096.

The spelling of 180638844 in words is "one hundred eighty million, six hundred thirty-eight thousand, eight hundred forty-four".