328193664 has 64 divisors (see below), whose sum is σ = 886118880. Its totient is φ = 107596800.

The previous prime is 328193651. The next prime is 328193699. The reversal of 328193664 is 466391823.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×328193664² = 215422162179489792, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16419 + ... + 30429.

Almost surely, 2^328193664 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 328193664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (443059440).

328193664 is an abundant number, since it is smaller than the sum of its proper divisors (557925216).

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

328193664 is a wasteful number, since it uses less digits than its factorization.

328193664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14089 (or 14077 counting only the distinct ones).

The product of its digits is 186624, while the sum is 42.

The square root of 328193664 is about 18116.1161400561. The cubic root of 328193664 is about 689.7791521733.

The spelling of 328193664 in words is "three hundred twenty-eight million, one hundred ninety-three thousand, six hundred sixty-four".