320806252 has 24 divisors (see below), whose sum is σ = 640162656. Its totient is φ = 139354368.

The previous prime is 320806247. The next prime is 320806261. The reversal of 320806252 is 252608023.

It is a self number, because there is not a number n which added to its sum of digits gives 320806252.

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, 180568 + ... + 182335.

It is an arithmetic number, because the mean of its divisors is an integer number (26673444).

Almost surely, 2^320806252 is an apocalyptic number.

It is an amenable number.

320806252 is a deficient number, since it is larger than the sum of its proper divisors (319356404).

320806252 is a wasteful number, since it uses less digits than its factorization.

320806252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362937 (or 362935 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 320806252 is about 17911.0650716254. The cubic root of 320806252 is about 684.5643433679.

The spelling of 320806252 in words is "three hundred twenty million, eight hundred six thousand, two hundred fifty-two".