328171720 has 32 divisors (see below), whose sum is σ = 740932920. Its totient is φ = 130816000.

The previous prime is 328171703. The next prime is 328171721. The reversal of 328171720 is 27171823.

It can be written as a sum of positive squares in 4 ways, for example, as 325369444 + 2802276 = 18038^2 + 1674^2 .

It is not an unprimeable number, because it can be changed into a prime (328171721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2281 + ... + 25720.

Almost surely, 2^328171720 is an apocalyptic number.

It is an amenable number.

328171720 is an abundant number, since it is smaller than the sum of its proper divisors (412761200).

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

328171720 is a wasteful number, since it uses less digits than its factorization.

328171720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28305 (or 28301 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 328171720 is about 18115.5104813527. The cubic root of 328171720 is about 689.7637782719.

The spelling of 328171720 in words is "three hundred twenty-eight million, one hundred seventy-one thousand, seven hundred twenty".