1320939385 has 16 divisors (see below), whose sum is σ = 1603123200. Its totient is φ = 1044820800.

The previous prime is 1320939247. The next prime is 1320939397. The reversal of 1320939385 is 5839390231.

1320939385 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1320939385 - 2¹¹ = 1320937337 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162160 + ... + 170110.

It is an arithmetic number, because the mean of its divisors is an integer number (100195200).

Almost surely, 2^1320939385 is an apocalyptic number.

It is an amenable number.

1320939385 is a deficient number, since it is larger than the sum of its proper divisors (282183815).

1320939385 is a wasteful number, since it uses less digits than its factorization.

1320939385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8328.

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 1320939385 is about 36344.7298105241. The cubic root of 1320939385 is about 1097.2214682267.

The spelling of 1320939385 in words is "one billion, three hundred twenty million, nine hundred thirty-nine thousand, three hundred eighty-five".