1392539568 has 80 divisors (see below), whose sum is σ = 4157591040. Its totient is φ = 393389568.

The previous prime is 1392539549. The next prime is 1392539569. The reversal of 1392539568 is 8659352931.

It is a self number, because there is not a number n which added to its sum of digits gives 1392539568.

It is not an unprimeable number, because it can be changed into a prime (1392539569) by changing a digit.

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, 6621 + ... + 53187.

It is an arithmetic number, because the mean of its divisors is an integer number (51969888).

Almost surely, 2^1392539568 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 1392539568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2078795520).

1392539568 is an abundant number, since it is smaller than the sum of its proper divisors (2765051472).

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

1392539568 is a wasteful number, since it uses less digits than its factorization.

1392539568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46674 (or 46668 counting only the distinct ones).

The product of its digits is 1749600, while the sum is 51.

The square root of 1392539568 is about 37316.7464819751. The cubic root of 1392539568 is about 1116.6982821771.

The spelling of 1392539568 in words is "one billion, three hundred ninety-two million, five hundred thirty-nine thousand, five hundred sixty-eight".