320864328 has 40 divisors (see below), whose sum is σ = 898719030. Its totient is φ = 106954560.

The previous prime is 320864321. The next prime is 320864339. The reversal of 320864328 is 823468023.

320864328 is a `hidden beast` number, since 3 + 2 + 0 + 8 + 643 + 2 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 240188004 + 80676324 = 15498^2 + 8982^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 320864292 and 320864301.

It is not an unprimeable number, because it can be changed into a prime (320864321) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 246933 + ... + 248228.

Almost surely, 2^320864328 is an apocalyptic number.

It is an amenable number.

320864328 is an abundant number, since it is smaller than the sum of its proper divisors (577854702).

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

320864328 is a wasteful number, since it uses less digits than its factorization.

320864328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495179 (or 495166 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 320864328 is about 17912.6862307137. The cubic root of 320864328 is about 684.6056500858.

The spelling of 320864328 in words is "three hundred twenty million, eight hundred sixty-four thousand, three hundred twenty-eight".