180518028 has 24 divisors (see below), whose sum is σ = 426285888. Its totient is φ = 59447376.

The previous prime is 180518021. The next prime is 180518047. The reversal of 180518028 is 820815081.

It is a self number, because there is not a number n which added to its sum of digits gives 180518028.

It is not an unprimeable number, because it can be changed into a prime (180518021) by changing a digit.

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, 89626 + ... + 91617.

It is an arithmetic number, because the mean of its divisors is an integer number (17761912).

Almost surely, 2^180518028 is an apocalyptic number.

It is an amenable number.

180518028 is an abundant number, since it is smaller than the sum of its proper divisors (245767860).

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

180518028 is a wasteful number, since it uses less digits than its factorization.

180518028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181333 (or 181331 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 33.

The square root of 180518028 is about 13435.6997584793. The cubic root of 180518028 is about 565.1627463401.

The spelling of 180518028 in words is "one hundred eighty million, five hundred eighteen thousand, twenty-eight".