328489640 has 64 divisors (see below), whose sum is σ = 807874560. Its totient is φ = 119669760.

The previous prime is 328489633. The next prime is 328489643. The reversal of 328489640 is 46984823.

It is a junction number, because it is equal to n+sod(n) for n = 328489591 and 328489600.

It is not an unprimeable number, because it can be changed into a prime (328489643) 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 15 ways as a sum of consecutive naturals, for example, 13289 + ... + 28871.

It is an arithmetic number, because the mean of its divisors is an integer number (12623040).

Almost surely, 2^328489640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 328489640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (403937280).

328489640 is an abundant number, since it is smaller than the sum of its proper divisors (479384920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

328489640 is a wasteful number, since it uses less digits than its factorization.

328489640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15642 (or 15638 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 44.

The square root of 328489640 is about 18124.2831582383. The cubic root of 328489640 is about 689.9864451584.

The spelling of 328489640 in words is "three hundred twenty-eight million, four hundred eighty-nine thousand, six hundred forty".