180738216 has 40 divisors (see below), whose sum is σ = 506236170. Its totient is φ = 60245856.

The previous prime is 180738199. The next prime is 180738251. The reversal of 180738216 is 612837081.

It can be written as a sum of positive squares in only one way, i.e., 179828100 + 910116 = 13410^2 + 954^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

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 9 ways as a sum of consecutive naturals, for example, 138811 + ... + 140106.

Almost surely, 2^180738216 is an apocalyptic number.

It is an amenable number.

180738216 is an abundant number, since it is smaller than the sum of its proper divisors (325497954).

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

180738216 is a wasteful number, since it uses less digits than its factorization.

180738216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278935 (or 278922 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 180738216 is about 13443.8914009300. The cubic root of 180738216 is about 565.3924399135.

The spelling of 180738216 in words is "one hundred eighty million, seven hundred thirty-eight thousand, two hundred sixteen".