180218332 has 54 divisors (see below), whose sum is σ = 375374328. Its totient is φ = 74161584.

The previous prime is 180218327. The next prime is 180218333. The reversal of 180218332 is 233812081.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 180218332.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180218333) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3054519 + ... + 3054577.

Almost surely, 2^180218332 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 180218332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187687164).

180218332 is an abundant number, since it is smaller than the sum of its proper divisors (195155996).

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

180218332 is an equidigital number, since it uses as much as digits as its factorization.

180218332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 180218332 is about 13424.5421523417. The cubic root of 180218332 is about 564.8498120660.

Multiplying 180218332 by its sum of digits (28), we get a square (5046113296 = 71036²).

180218332 divided by its sum of digits (28) gives a square (6436369 = 2537²).

The spelling of 180218332 in words is "one hundred eighty million, two hundred eighteen thousand, three hundred thirty-two".