320913530 has 32 divisors (see below), whose sum is σ = 667595520. Its totient is φ = 108789120.

The previous prime is 320913499. The next prime is 320913533. The reversal of 320913530 is 35319023.

It is a self number, because there is not a number n which added to its sum of digits gives 320913530.

It is not an unprimeable number, because it can be changed into a prime (320913533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19526 + ... + 31985.

It is an arithmetic number, because the mean of its divisors is an integer number (20862360).

Almost surely, 2^320913530 is an apocalyptic number.

320913530 is an abundant number, since it is smaller than the sum of its proper divisors (346681990).

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

320913530 is a wasteful number, since it uses less digits than its factorization.

320913530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51614.

The product of its (nonzero) digits is 2430, while the sum is 26.

The square root of 320913530 is about 17914.0595622544. The cubic root of 320913530 is about 684.6406412463.

The spelling of 320913530 in words is "three hundred twenty million, nine hundred thirteen thousand, five hundred thirty".