1311831678 has 8 divisors (see below), whose sum is σ = 2623663368. Its totient is φ = 437277224.

The previous prime is 1311831667. The next prime is 1311831679. The reversal of 1311831678 is 8761381131.

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

1311831678 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311831679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109319301 + ... + 109319312.

It is an arithmetic number, because the mean of its divisors is an integer number (327957921).

Almost surely, 2^1311831678 is an apocalyptic number.

1311831678 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1311831678 is a wasteful number, since it uses less digits than its factorization.

1311831678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218638618.

The product of its digits is 24192, while the sum is 39.

The square root of 1311831678 is about 36219.2169711053. The cubic root of 1311831678 is about 1094.6939166592.

The spelling of 1311831678 in words is "one billion, three hundred eleven million, eight hundred thirty-one thousand, six hundred seventy-eight".