1328111807 has 4 divisors (see below), whose sum is σ = 1448849256. Its totient is φ = 1207374360.

The previous prime is 1328111783. The next prime is 1328111809. The reversal of 1328111807 is 7081118231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1328111807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328111809) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 60368708 + ... + 60368729.

It is an arithmetic number, because the mean of its divisors is an integer number (362212314).

Almost surely, 2^1328111807 is an apocalyptic number.

1328111807 is a deficient number, since it is larger than the sum of its proper divisors (120737449).

1328111807 is a wasteful number, since it uses less digits than its factorization.

1328111807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120737448.

The product of its (nonzero) digits is 2688, while the sum is 32.

The square root of 1328111807 is about 36443.2683358669. The cubic root of 1328111807 is about 1099.2037783491.

The spelling of 1328111807 in words is "one billion, three hundred twenty-eight million, one hundred eleven thousand, eight hundred seven".