1311748672 has 56 divisors (see below), whose sum is σ = 2830632896. Its totient is φ = 599505408.

The previous prime is 1311748667. The next prime is 1311748681. The reversal of 1311748672 is 2768471131.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78043 + ... + 93349.

It is an arithmetic number, because the mean of its divisors is an integer number (50547016).

Almost surely, 2^1311748672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1311748672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1415316448).

1311748672 is an abundant number, since it is smaller than the sum of its proper divisors (1518884224).

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

1311748672 is a wasteful number, since it uses less digits than its factorization.

1311748672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15435 (or 15425 counting only the distinct ones).

The product of its digits is 56448, while the sum is 40.

The square root of 1311748672 is about 36218.0710695642. The cubic root of 1311748672 is about 1094.6708272946.

The spelling of 1311748672 in words is "one billion, three hundred eleven million, seven hundred forty-eight thousand, six hundred seventy-two".