1391264672 has 96 divisors (see below), whose sum is σ = 3230502912. Its totient is φ = 577453824.

The previous prime is 1391264653. The next prime is 1391264711. The reversal of 1391264672 is 2764621931.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1083743 + ... + 1085025.

It is an arithmetic number, because the mean of its divisors is an integer number (33651072).

Almost surely, 2^1391264672 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 1391264672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1615251456).

1391264672 is an abundant number, since it is smaller than the sum of its proper divisors (1839238240).

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

1391264672 is a wasteful number, since it uses less digits than its factorization.

1391264672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450 (or 1442 counting only the distinct ones).

The product of its digits is 108864, while the sum is 41.

The square root of 1391264672 is about 37299.6604810285. The cubic root of 1391264672 is about 1116.3573920763.

The spelling of 1391264672 in words is "one billion, three hundred ninety-one million, two hundred sixty-four thousand, six hundred seventy-two".