328730220 has 432 divisors, whose sum is σ = 1296667008. Its totient is φ = 66769920.

The previous prime is 328730203. The next prime is 328730239. The reversal of 328730220 is 22037823.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 5388990 + ... + 5389050.

It is an arithmetic number, because the mean of its divisors is an integer number (3001544).

Almost surely, 2^328730220 is an apocalyptic number.

328730220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 328730220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (648333504).

328730220 is an abundant number, since it is smaller than the sum of its proper divisors (967936788).

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

328730220 is a wasteful number, since it uses less digits than its factorization.

328730220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 328730220 is about 18130.9188956324. The cubic root of 328730220 is about 690.1548486744.

The spelling of 328730220 in words is "three hundred twenty-eight million, seven hundred thirty thousand, two hundred twenty".