328218489 has 12 divisors (see below), whose sum is σ = 485657172. Its totient is φ = 213475200.

The previous prime is 328218481. The next prime is 328218493. The reversal of 328218489 is 984812823.

It can be written as a sum of positive squares in 2 ways, for example, as 136118889 + 192099600 = 11667^2 + 13860^2 .

It is not a de Polignac number, because 328218489 - 2³ = 328218481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (328218481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 444372 + ... + 445109.

It is an arithmetic number, because the mean of its divisors is an integer number (40471431).

Almost surely, 2^328218489 is an apocalyptic number.

It is an amenable number.

328218489 is a deficient number, since it is larger than the sum of its proper divisors (157438683).

328218489 is a wasteful number, since it uses less digits than its factorization.

328218489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889528 (or 889525 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 328218489 is about 18116.8012905148. The cubic root of 328218489 is about 689.7965436686.

The spelling of 328218489 in words is "three hundred twenty-eight million, two hundred eighteen thousand, four hundred eighty-nine".