320630005 has 32 divisors (see below), whose sum is σ = 413973504. Its totient is φ = 237828096.

The previous prime is 320629961. The next prime is 320630017. The reversal of 320630005 is 500036023.

It is not a de Polignac number, because 320630005 - 2¹³ = 320621813 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 740269 + ... + 740701.

It is an arithmetic number, because the mean of its divisors is an integer number (12936672).

Almost surely, 2^320630005 is an apocalyptic number.

It is an amenable number.

320630005 is a deficient number, since it is larger than the sum of its proper divisors (93343499).

320630005 is a wasteful number, since it uses less digits than its factorization.

320630005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 320630005 is about 17906.1443365120. The cubic root of 320630005 is about 684.4389566662.

Adding to 320630005 its reverse (500036023), we get a palindrome (820666028).

The spelling of 320630005 in words is "three hundred twenty million, six hundred thirty thousand, five".