328628165 has 4 divisors (see below), whose sum is σ = 394353804. Its totient is φ = 262902528.

The previous prime is 328628129. The next prime is 328628189. The reversal of 328628165 is 561826823.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 561826823 = 2179 ⋅257837.

It can be written as a sum of positive squares in 2 ways, for example, as 34093921 + 294534244 = 5839^2 + 17162^2 .

It is a cyclic number.

It is not a de Polignac number, because 328628165 - 2⁶ = 328628101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 32862812 + ... + 32862821.

It is an arithmetic number, because the mean of its divisors is an integer number (98588451).

Almost surely, 2^328628165 is an apocalyptic number.

It is an amenable number.

328628165 is a deficient number, since it is larger than the sum of its proper divisors (65725639).

328628165 is an equidigital number, since it uses as much as digits as its factorization.

328628165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65725638.

The product of its digits is 138240, while the sum is 41.

The square root of 328628165 is about 18128.1042858871. The cubic root of 328628165 is about 690.0834212659.

The spelling of 328628165 in words is "three hundred twenty-eight million, six hundred twenty-eight thousand, one hundred sixty-five".