328518405 has 12 divisors (see below), whose sum is σ = 569431980. Its totient is φ = 175209792.

The previous prime is 328518401. The next prime is 328518413. The reversal of 328518405 is 504815823.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 42536484 + 285981921 = 6522^2 + 16911^2 .

It is not a de Polignac number, because 328518405 - 2² = 328518401 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 328518405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328518401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3650160 + ... + 3650249.

It is an arithmetic number, because the mean of its divisors is an integer number (47452665).

Almost surely, 2^328518405 is an apocalyptic number.

It is an amenable number.

328518405 is a deficient number, since it is larger than the sum of its proper divisors (240913575).

328518405 is a wasteful number, since it uses less digits than its factorization.

328518405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7300420 (or 7300417 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 328518405 is about 18125.0766894929. The cubic root of 328518405 is about 690.0065846883.

The spelling of 328518405 in words is "three hundred twenty-eight million, five hundred eighteen thousand, four hundred five".