320802005 has 8 divisors (see below), whose sum is σ = 385924824. Its totient is φ = 256000000.

The previous prime is 320801977. The next prime is 320802011. The reversal of 320802005 is 500208023.

It can be written as a sum of positive squares in 4 ways, for example, as 242674084 + 78127921 = 15578^2 + 8839^2 .

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

It is not a de Polignac number, because 320802005 - 2¹⁶ = 320736469 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 77996 + ... + 82005.

It is an arithmetic number, because the mean of its divisors is an integer number (48240603).

Almost surely, 2^320802005 is an apocalyptic number.

It is an amenable number.

320802005 is a deficient number, since it is larger than the sum of its proper divisors (65122819).

320802005 is a wasteful number, since it uses less digits than its factorization.

320802005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160407.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 320802005 is about 17910.9465132360. The cubic root of 320802005 is about 684.5613224817.

It can be divided in two parts, 32080 and 2005, that multiplied together give a square (64320400 = 8020²).

The spelling of 320802005 in words is "three hundred twenty million, eight hundred two thousand, five".