328644228 has 72 divisors (see below), whose sum is σ = 850770144. Its totient is φ = 98658560.

The previous prime is 328644223. The next prime is 328644287. The reversal of 328644228 is 822446823.

It is not an unprimeable number, because it can be changed into a prime (328644223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 163075 + ... + 165077.

It is an arithmetic number, because the mean of its divisors is an integer number (11816252).

Almost surely, 2^328644228 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 328644228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (425385072).

328644228 is an abundant number, since it is smaller than the sum of its proper divisors (522125916).

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

328644228 is a wasteful number, since it uses less digits than its factorization.

328644228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2145 (or 2132 counting only the distinct ones).

The product of its digits is 147456, while the sum is 39.

The square root of 328644228 is about 18128.5473218347. The cubic root of 328644228 is about 690.0946646006.

The spelling of 328644228 in words is "three hundred twenty-eight million, six hundred forty-four thousand, two hundred twenty-eight".