1380431872 has 48 divisors (see below), whose sum is σ = 2775427200. Its totient is φ = 686407680.

The previous prime is 1380431867. The next prime is 1380431893. The reversal of 1380431872 is 2781340831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389404 + ... + 392932.

It is an arithmetic number, because the mean of its divisors is an integer number (57821400).

Almost surely, 2^1380431872 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 1380431872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1387713600).

1380431872 is an abundant number, since it is smaller than the sum of its proper divisors (1394995328).

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

1380431872 is an equidigital number, since it uses as much as digits as its factorization.

1380431872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3742 (or 3722 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 1380431872 is about 37154.1635890246. The cubic root of 1380431872 is about 1113.4524092064.

The spelling of 1380431872 in words is "one billion, three hundred eighty million, four hundred thirty-one thousand, eight hundred seventy-two".