320628605 has 16 divisors (see below), whose sum is σ = 420120000. Its totient is φ = 232968960.

The previous prime is 320628599. The next prime is 320628613. The reversal of 320628605 is 506826023.

It is not a de Polignac number, because 320628605 - 2¹² = 320624509 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80501 + ... + 84389.

It is an arithmetic number, because the mean of its divisors is an integer number (26257500).

Almost surely, 2^320628605 is an apocalyptic number.

It is an amenable number.

320628605 is a deficient number, since it is larger than the sum of its proper divisors (99491395).

320628605 is a wasteful number, since it uses less digits than its factorization.

320628605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5404.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 320628605 is about 17906.1052437430. The cubic root of 320628605 is about 684.4379604858.

The spelling of 320628605 in words is "three hundred twenty million, six hundred twenty-eight thousand, six hundred five".