320328064 has 32 divisors (see below), whose sum is σ = 729320400. Its totient is φ = 137283072.

The previous prime is 320328037. The next prime is 320328067. The reversal of 320328064 is 460823023.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×320328064² = 205220137171976192, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320328067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177859 + ... + 179650.

Almost surely, 2^320328064 is an apocalyptic number.

It is an amenable number.

320328064 is an abundant number, since it is smaller than the sum of its proper divisors (408992336).

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

320328064 is an equidigital number, since it uses as much as digits as its factorization.

320328064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357530 (or 357518 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 320328064 is about 17897.7111385786. The cubic root of 320328064 is about 684.2240411507.

The spelling of 320328064 in words is "three hundred twenty million, three hundred twenty-eight thousand, sixty-four".