1320013872 has 30 divisors (see below), whose sum is σ = 3694205892. Its totient is φ = 440004576.

The previous prime is 1320013867. The next prime is 1320013873. The reversal of 1320013872 is 2783100231.

It is not an unprimeable number, because it can be changed into a prime (1320013873) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4583238 + ... + 4583525.

Almost surely, 2^1320013872 is an apocalyptic number.

1320013872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1320013872 is an abundant number, since it is smaller than the sum of its proper divisors (2374192020).

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

1320013872 is a wasteful number, since it uses less digits than its factorization.

1320013872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9166777 (or 9166768 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 1320013872 is about 36331.9951557852. The cubic root of 1320013872 is about 1096.9651531618.

It can be divided in two parts, 13200 and 13872, that added together give a palindrome (27072).

The spelling of 1320013872 in words is "one billion, three hundred twenty million, thirteen thousand, eight hundred seventy-two".