1381328872 has 64 divisors (see below), whose sum is σ = 3297853440. Its totient is φ = 526718400.

The previous prime is 1381328857. The next prime is 1381328873. The reversal of 1381328872 is 2788231831.

It is not an unprimeable number, because it can be changed into a prime (1381328873) 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, 5097 + ... + 52807.

It is an arithmetic number, because the mean of its divisors is an integer number (51528960).

Almost surely, 2^1381328872 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 1381328872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1648926720).

1381328872 is an abundant number, since it is smaller than the sum of its proper divisors (1916524568).

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

1381328872 is a wasteful number, since it uses less digits than its factorization.

1381328872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47782 (or 47778 counting only the distinct ones).

The product of its digits is 129024, while the sum is 43.

The square root of 1381328872 is about 37166.2329541211. The cubic root of 1381328872 is about 1113.6935295344.

The spelling of 1381328872 in words is "one billion, three hundred eighty-one million, three hundred twenty-eight thousand, eight hundred seventy-two".