1320673872 has 120 divisors (see below), whose sum is σ = 3980358336. Its totient is φ = 376233984.

The previous prime is 1320673843. The next prime is 1320673933. The reversal of 1320673872 is 2783760231.

1320673872 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 1320673872.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1144848 + ... + 1146000.

Almost surely, 2^1320673872 is an apocalyptic number.

1320673872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1320673872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1990179168).

1320673872 is an abundant number, since it is smaller than the sum of its proper divisors (2659684464).

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

1320673872 is a wasteful number, since it uses less digits than its factorization.

1320673872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665 (or 1652 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 1320673872 is about 36341.0769240539. The cubic root of 1320673872 is about 1097.1479483038.

It can be divided in two parts, 13206 and 73872, that added together give a palindrome (87078).

The spelling of 1320673872 in words is "one billion, three hundred twenty million, six hundred seventy-three thousand, eight hundred seventy-two".