320352009 has 16 divisors (see below), whose sum is σ = 442830720. Its totient is φ = 205752960.

The previous prime is 320352007. The next prime is 320352013. The reversal of 320352009 is 900253023.

It is not a de Polignac number, because 320352009 - 2¹ = 320352007 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 320352009.

It is not an unprimeable number, because it can be changed into a prime (320352001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38589 + ... + 46149.

It is an arithmetic number, because the mean of its divisors is an integer number (27676920).

Almost surely, 2^320352009 is an apocalyptic number.

It is an amenable number.

320352009 is a deficient number, since it is larger than the sum of its proper divisors (122478711).

320352009 is a wasteful number, since it uses less digits than its factorization.

320352009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8080.

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 320352009 is about 17898.3800663635. The cubic root of 320352009 is about 684.2410896480.

The spelling of 320352009 in words is "three hundred twenty million, three hundred fifty-two thousand, nine".