328080640 has 36 divisors (see below), whose sum is σ = 785858724. Its totient is φ = 131231744.

The previous prime is 328080629. The next prime is 328080659. The reversal of 328080640 is 46080823.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 86713344 + 241367296 = 9312^2 + 15536^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126877 + ... + 129436.

It is an arithmetic number, because the mean of its divisors is an integer number (21829409).

Almost surely, 2^328080640 is an apocalyptic number.

It is an amenable number.

328080640 is an abundant number, since it is smaller than the sum of its proper divisors (457778084).

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

328080640 is an equidigital number, since it uses as much as digits as its factorization.

328080640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256334 (or 256320 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 328080640 is about 18112.9964390213. The cubic root of 328080640 is about 689.6999605671.

The spelling of 328080640 in words is "three hundred twenty-eight million, eighty thousand, six hundred forty".