320603664 has 40 divisors (see below), whose sum is σ = 831871360. Its totient is φ = 106397568.

The previous prime is 320603659. The next prime is 320603669. The reversal of 320603664 is 466306023.

It is an interprime number because it is at equal distance from previous prime (320603659) and next prime (320603669).

It is not an unprimeable number, because it can be changed into a prime (320603669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3592 + ... + 25575.

It is an arithmetic number, because the mean of its divisors is an integer number (20796784).

Almost surely, 2^320603664 is an apocalyptic number.

It is an amenable number.

320603664 is an abundant number, since it is smaller than the sum of its proper divisors (511267696).

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

320603664 is a wasteful number, since it uses less digits than its factorization.

320603664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29407 (or 29401 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 30.

The square root of 320603664 is about 17905.4087917590. The cubic root of 320603664 is about 684.4202130468.

Adding to 320603664 its reverse (466306023), we get a palindrome (786909687).

The spelling of 320603664 in words is "three hundred twenty million, six hundred three thousand, six hundred sixty-four".