1391283472 has 80 divisors (see below), whose sum is σ = 2920384512. Its totient is φ = 640673280.

The previous prime is 1391283461. The next prime is 1391283499. The reversal of 1391283472 is 2743821931.

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, 861738 + ... + 863350.

Almost surely, 2^1391283472 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 1391283472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1460192256).

1391283472 is an abundant number, since it is smaller than the sum of its proper divisors (1529101040).

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

1391283472 is a wasteful number, since it uses less digits than its factorization.

1391283472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1736 (or 1730 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The square root of 1391283472 is about 37299.9124931949. The cubic root of 1391283472 is about 1116.3624204568.

The spelling of 1391283472 in words is "one billion, three hundred ninety-one million, two hundred eighty-three thousand, four hundred seventy-two".