328555643 has 8 divisors (see below), whose sum is σ = 355178208. Its totient is φ = 302125824.

The previous prime is 328555631. The next prime is 328555663. The reversal of 328555643 is 346555823.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 328555643 - 2⁸ = 328555387 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 328555643.

It is not an unprimeable number, because it can be changed into a prime (328555603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44630 + ... + 51467.

It is an arithmetic number, because the mean of its divisors is an integer number (44397276).

Almost surely, 2^328555643 is an apocalyptic number.

328555643 is a deficient number, since it is larger than the sum of its proper divisors (26622565).

328555643 is a wasteful number, since it uses less digits than its factorization.

328555643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96373.

The product of its digits is 432000, while the sum is 41.

The square root of 328555643 is about 18126.1039112105. The cubic root of 328555643 is about 690.0326547593.

The spelling of 328555643 in words is "three hundred twenty-eight million, five hundred fifty-five thousand, six hundred forty-three".