328318649 has 4 divisors (see below), whose sum is σ = 337192164. Its totient is φ = 319445136.

The previous prime is 328318633. The next prime is 328318673. The reversal of 328318649 is 946813823.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 229674025 + 98644624 = 15155^2 + 9932^2 .

It is a cyclic number.

It is not a de Polignac number, because 328318649 - 2⁴ = 328318633 is a prime.

It is a super-3 number, since 3×328318649³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (328318849) 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 3 ways as a sum of consecutive naturals, for example, 4436702 + ... + 4436775.

It is an arithmetic number, because the mean of its divisors is an integer number (84298041).

Almost surely, 2^328318649 is an apocalyptic number.

It is an amenable number.

328318649 is a deficient number, since it is larger than the sum of its proper divisors (8873515).

328318649 is an equidigital number, since it uses as much as digits as its factorization.

328318649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8873514.

The product of its digits is 248832, while the sum is 44.

The square root of 328318649 is about 18119.5653645445. The cubic root of 328318649 is about 689.8667032294.

The spelling of 328318649 in words is "three hundred twenty-eight million, three hundred eighteen thousand, six hundred forty-nine".