328220660 has 12 divisors (see below), whose sum is σ = 689263428. Its totient is φ = 131288256.

The previous prime is 328220657. The next prime is 328220663. The reversal of 328220660 is 66022823.

It is an interprime number because it is at equal distance from previous prime (328220657) and next prime (328220663).

It can be written as a sum of positive squares in 2 ways, for example, as 33686416 + 294534244 = 5804^2 + 17162^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328220663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8205497 + ... + 8205536.

It is an arithmetic number, because the mean of its divisors is an integer number (57438619).

Almost surely, 2^328220660 is an apocalyptic number.

It is an amenable number.

328220660 is an abundant number, since it is smaller than the sum of its proper divisors (361042768).

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

328220660 is a wasteful number, since it uses less digits than its factorization.

328220660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16411042 (or 16411040 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 328220660 is about 18116.8612071738. The cubic root of 328220660 is about 689.7980645508.

The spelling of 328220660 in words is "three hundred twenty-eight million, two hundred twenty thousand, six hundred sixty".