328561218 has 16 divisors (see below), whose sum is σ = 730136160. Its totient is φ = 109520388.

The previous prime is 328561201. The next prime is 328561229. The reversal of 328561218 is 812165823.

It is a happy number.

328561218 is a `hidden beast` number, since 3 + 28 + 5 + 612 + 18 = 666.

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 7 ways as a sum of consecutive naturals, for example, 3042180 + ... + 3042287.

It is an arithmetic number, because the mean of its divisors is an integer number (45633510).

Almost surely, 2^328561218 is an apocalyptic number.

328561218 is an abundant number, since it is smaller than the sum of its proper divisors (401574942).

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

328561218 is a wasteful number, since it uses less digits than its factorization.

328561218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6084478 (or 6084472 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 328561218 is about 18126.2576942953. The cubic root of 328561218 is about 690.0365576094.

The spelling of 328561218 in words is "three hundred twenty-eight million, five hundred sixty-one thousand, two hundred eighteen".