320508745 has 8 divisors (see below), whose sum is σ = 392793984. Its totient is φ = 250951344.

The previous prime is 320508737. The next prime is 320508751. The reversal of 320508745 is 547805023.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 320508745 - 2³ = 320508737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320508745.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 681699 + ... + 682168.

It is an arithmetic number, because the mean of its divisors is an integer number (49099248).

Almost surely, 2^320508745 is an apocalyptic number.

It is an amenable number.

320508745 is a deficient number, since it is larger than the sum of its proper divisors (72285239).

320508745 is a wasteful number, since it uses less digits than its factorization.

320508745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363919.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 320508745 is about 17902.7580277453. The cubic root of 320508745 is about 684.3526624625.

The spelling of 320508745 in words is "three hundred twenty million, five hundred eight thousand, seven hundred forty-five".