328601331 has 12 divisors (see below), whose sum is σ = 476619000. Its totient is φ = 218157120.

The previous prime is 328601323. The next prime is 328601353. The reversal of 328601331 is 133106823.

It is a happy number.

328601331 is a `hidden beast` number, since 3 + 28 + 601 + 3 + 31 = 666.

It is not a de Polignac number, because 328601331 - 2³ = 328601323 is a prime.

It is a super-2 number, since 2×328601331² = 215957669469943122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 328601295 and 328601304.

It is not an unprimeable number, because it can be changed into a prime (328601311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73581 + ... + 77918.

It is an arithmetic number, because the mean of its divisors is an integer number (39718250).

Almost surely, 2^328601331 is an apocalyptic number.

328601331 is a deficient number, since it is larger than the sum of its proper divisors (148017669).

328601331 is a wasteful number, since it uses less digits than its factorization.

328601331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151746 (or 151743 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 328601331 is about 18127.3641492634. The cubic root of 328601331 is about 690.0646379270.

It can be divided in two parts, 32860 and 1331, that added together give a triangular number (34191 = T₂₆₁).

The spelling of 328601331 in words is "three hundred twenty-eight million, six hundred one thousand, three hundred thirty-one".