320412005 has 8 divisors (see below), whose sum is σ = 407111832. Its totient is φ = 241251328.

The previous prime is 320411957. The next prime is 320412013. The reversal of 320412005 is 500214023.

It can be written as a sum of positive squares in 4 ways, for example, as 76615009 + 243796996 = 8753^2 + 15614^2 .

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 320412005 - 2⁶ = 320411941 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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, 1884692 + ... + 1884861.

It is an arithmetic number, because the mean of its divisors is an integer number (50888979).

Almost surely, 2^320412005 is an apocalyptic number.

It is an amenable number.

320412005 is a deficient number, since it is larger than the sum of its proper divisors (86699827).

320412005 is a wasteful number, since it uses less digits than its factorization.

320412005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3769575.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 320412005 is about 17900.0560054990. The cubic root of 320412005 is about 684.2838022109.

Adding to 320412005 its reverse (500214023), we get a palindrome (820626028).

The spelling of 320412005 in words is "three hundred twenty million, four hundred twelve thousand, five".