1392131328 has 144 divisors (see below), whose sum is σ = 4269834240. Its totient is φ = 394426368.

The previous prime is 1392131303. The next prime is 1392131339. The reversal of 1392131328 is 8231312931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 681733 + ... + 683771.

Almost surely, 2^1392131328 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 1392131328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2134917120).

1392131328 is an abundant number, since it is smaller than the sum of its proper divisors (2877702912).

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

1392131328 is a wasteful number, since it uses less digits than its factorization.

1392131328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2192 (or 2178 counting only the distinct ones).

The product of its digits is 7776, while the sum is 33.

The square root of 1392131328 is about 37311.2761507832. The cubic root of 1392131328 is about 1116.5891469268.

The spelling of 1392131328 in words is "one billion, three hundred ninety-two million, one hundred thirty-one thousand, three hundred twenty-eight".