1380431871 has 216 divisors, whose sum is σ = 2845795680. Its totient is φ = 637072128.

The previous prime is 1380431867. The next prime is 1380431893. The reversal of 1380431871 is 1781340831.

It is not a de Polignac number, because 1380431871 - 2² = 1380431867 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380431821) by changing a digit.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 47601085 + ... + 47601113.

It is an arithmetic number, because the mean of its divisors is an integer number (13174980).

Almost surely, 2^1380431871 is an apocalyptic number.

1380431871 is an abundant number, since it is smaller than the sum of its proper divisors (1465363809).

1380431871 is a wasteful number, since it uses less digits than its factorization.

1380431871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 1380431871 is about 37154.1635755671. The cubic root of 1380431871 is about 1113.4524089375.

The spelling of 1380431871 in words is "one billion, three hundred eighty million, four hundred thirty-one thousand, eight hundred seventy-one".