320628105306 has 12 divisors (see below), whose sum is σ = 694694228202. Its totient is φ = 106876035096.

The previous prime is 320628105257. The next prime is 320628105323. The reversal of 320628105306 is 603501826023.

It is a happy number.

320628105306 is a `hidden beast` number, since 3 + 20 + 628 + 1 + 0 + 5 + 3 + 0 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 300791918025 + 19836187281 = 548445^2 + 140841^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8906336241 + ... + 8906336276.

Almost surely, 2^320628105306 is an apocalyptic number.

320628105306 is an abundant number, since it is smaller than the sum of its proper divisors (374066122896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320628105306 is a wasteful number, since it uses less digits than its factorization.

320628105306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17812672525 (or 17812672522 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 320628105306 in words is "three hundred twenty billion, six hundred twenty-eight million, one hundred five thousand, three hundred six".