180216980 has 12 divisors (see below), whose sum is σ = 378455700. Its totient is φ = 72086784.

The previous prime is 180216943. The next prime is 180216989. The reversal of 180216980 is 89612081.

It can be written as a sum of positive squares in 2 ways, for example, as 80496784 + 99720196 = 8972^2 + 9986^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 180216980.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180216989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4505405 + ... + 4505444.

It is an arithmetic number, because the mean of its divisors is an integer number (31537975).

Almost surely, 2^180216980 is an apocalyptic number.

180216980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

180216980 is an abundant number, since it is smaller than the sum of its proper divisors (198238720).

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

180216980 is a wasteful number, since it uses less digits than its factorization.

180216980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9010858 (or 9010856 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 180216980 is about 13424.4917967125. The cubic root of 180216980 is about 564.8483995592.

The spelling of 180216980 in words is "one hundred eighty million, two hundred sixteen thousand, nine hundred eighty".