1380871811 has 8 divisors (see below), whose sum is σ = 1510282800. Its totient is φ = 1252107040.

The previous prime is 1380871777. The next prime is 1380871819. The reversal of 1380871811 is 1181780831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1380871811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1380871819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157076 + ... + 165633.

It is an arithmetic number, because the mean of its divisors is an integer number (188785350).

Almost surely, 2^1380871811 is an apocalyptic number.

1380871811 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1380871811 is a deficient number, since it is larger than the sum of its proper divisors (129410989).

1380871811 is a wasteful number, since it uses less digits than its factorization.

1380871811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323109.

The product of its (nonzero) digits is 10752, while the sum is 38.

The square root of 1380871811 is about 37160.0835709502. The cubic root of 1380871811 is about 1113.5706811570.

The spelling of 1380871811 in words is "one billion, three hundred eighty million, eight hundred seventy-one thousand, eight hundred eleven".