328643217 has 32 divisors (see below), whose sum is σ = 557356800. Its totient is φ = 187484544.

The previous prime is 328643207. The next prime is 328643219. The reversal of 328643217 is 712346823.

It is a happy number.

328643217 is a `hidden beast` number, since 3 + 2 + 8 + 643 + 2 + 1 + 7 = 666.

It is not a de Polignac number, because 328643217 - 2¹¹ = 328641169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (328643219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 160959 + ... + 162987.

It is an arithmetic number, because the mean of its divisors is an integer number (17417400).

Almost surely, 2^328643217 is an apocalyptic number.

It is an amenable number.

328643217 is a deficient number, since it is larger than the sum of its proper divisors (228713583).

328643217 is a wasteful number, since it uses less digits than its factorization.

328643217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2902 (or 2896 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 328643217 is about 18128.5194376154. The cubic root of 328643217 is about 690.0939569596.

It can be divided in two parts, 328 and 643217, that added together give a triangular number (643545 = T₁₁₃₄).

The spelling of 328643217 in words is "three hundred twenty-eight million, six hundred forty-three thousand, two hundred seventeen".