320000005 has 16 divisors (see below), whose sum is σ = 414603504. Its totient is φ = 235699200.

The previous prime is 319999969. The next prime is 320000077. The reversal of 320000005 is 500000023.

It can be written as a sum of positive squares in 8 ways, for example, as 9042049 + 310957956 = 3007^2 + 17634^2 .

It is not a de Polignac number, because 320000005 - 2¹³ = 319991813 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 319999946 and 320000000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19927 + ... + 32203.

It is an arithmetic number, because the mean of its divisors is an integer number (25912719).

Almost surely, 2^320000005 is an apocalyptic number.

It is an amenable number.

320000005 is a deficient number, since it is larger than the sum of its proper divisors (94603499).

320000005 is a wasteful number, since it uses less digits than its factorization.

320000005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12696.

The product of its (nonzero) digits is 30, while the sum is 10.

The square root of 320000005 is about 17888.5439597526. The cubic root of 320000005 is about 683.9903822331.

Adding to 320000005 its reverse (500000023), we get a palindrome (820000028).

The spelling of 320000005 in words is "three hundred twenty million, five", and thus it is an aban number.