328203931 has 16 divisors (see below), whose sum is σ = 367089408. Its totient is φ = 290898400.

The previous prime is 328203919. The next prime is 328203971. The reversal of 328203931 is 139302823.

It is a cyclic number.

It is not a de Polignac number, because 328203931 - 2⁹ = 328203419 is a prime.

It is a super-2 number, since 2×328203931² = 215435640647705522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 328203893 and 328203902.

It is not an unprimeable number, because it can be changed into a prime (328203901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95676 + ... + 99046.

It is an arithmetic number, because the mean of its divisors is an integer number (22943088).

Almost surely, 2^328203931 is an apocalyptic number.

328203931 is a deficient number, since it is larger than the sum of its proper divisors (38885477).

328203931 is a wasteful number, since it uses less digits than its factorization.

328203931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3602.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 328203931 is about 18116.3995043165. The cubic root of 328203931 is about 689.7863449677.

The spelling of 328203931 in words is "three hundred twenty-eight million, two hundred three thousand, nine hundred thirty-one".