180445320 has 320 divisors, whose sum is σ = 680581440. Its totient is φ = 42508800.

The previous prime is 180445319. The next prime is 180445339. The reversal of 180445320 is 23544081.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2173999 + ... + 2174081.

It is an arithmetic number, because the mean of its divisors is an integer number (2126817).

Almost surely, 2^180445320 is an apocalyptic number.

180445320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 180445320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (340290720).

180445320 is an abundant number, since it is smaller than the sum of its proper divisors (500136120).

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

180445320 is a wasteful number, since it uses less digits than its factorization.

180445320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 180445320 is about 13432.9937095199. The cubic root of 180445320 is about 565.0868584975.

The spelling of 180445320 in words is "one hundred eighty million, four hundred forty-five thousand, three hundred twenty".