1392578768 has 80 divisors (see below), whose sum is σ = 3196997760. Its totient is φ = 575175168.

The previous prime is 1392578767. The next prime is 1392578791. The reversal of 1392578768 is 8678752931.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1392578767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 450155 + ... + 453237.

It is an arithmetic number, because the mean of its divisors is an integer number (39962472).

Almost surely, 2^1392578768 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 1392578768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1598498880).

1392578768 is an abundant number, since it is smaller than the sum of its proper divisors (1804418992).

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

1392578768 is a wasteful number, since it uses less digits than its factorization.

1392578768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3244 (or 3238 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 56.

The square root of 1392578768 is about 37317.2717116351. The cubic root of 1392578768 is about 1116.7087604340.

The spelling of 1392578768 in words is "one billion, three hundred ninety-two million, five hundred seventy-eight thousand, seven hundred sixty-eight".