1392447488 has 52 divisors (see below), whose sum is σ = 2830711308. Its totient is φ = 684687360.

The previous prime is 1392447481. The next prime is 1392447523. The reversal of 1392447488 is 8847442931.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 52301824 + 1340145664 = 7232^2 + 36608^2 .

It is not an unprimeable number, because it can be changed into a prime (1392447481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247070 + ... + 252642.

Almost surely, 2^1392447488 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 1392447488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1415355654).

1392447488 is an abundant number, since it is smaller than the sum of its proper divisors (1438263820).

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

1392447488 is an frugal number, since it uses more digits than its factorization.

1392447488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5658 (or 5636 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 50.

The square root of 1392447488 is about 37315.5126991443. The cubic root of 1392447488 is about 1116.6736681920.

The spelling of 1392447488 in words is "one billion, three hundred ninety-two million, four hundred forty-seven thousand, four hundred eighty-eight".