180189220 has 24 divisors (see below), whose sum is σ = 378705600. Its totient is φ = 72016992.

The previous prime is 180189173. The next prime is 180189227. The reversal of 180189220 is 22981081.

It is a happy number.

180189220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (180189227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28291 + ... + 34069.

It is an arithmetic number, because the mean of its divisors is an integer number (15779400).

Almost surely, 2^180189220 is an apocalyptic number.

180189220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

180189220 is an abundant number, since it is smaller than the sum of its proper divisors (198516380).

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

180189220 is a wasteful number, since it uses less digits than its factorization.

180189220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7347 (or 7345 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 180189220 is about 13423.4578257616. The cubic root of 180189220 is about 564.8193956389.

The spelling of 180189220 in words is "one hundred eighty million, one hundred eighty-nine thousand, two hundred twenty".