1311436056 has 64 divisors (see below), whose sum is σ = 3749644800. Its totient is φ = 374427648.

The previous prime is 1311436039. The next prime is 1311436079. The reversal of 1311436056 is 6506341131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 450301 + ... + 453203.

It is an arithmetic number, because the mean of its divisors is an integer number (58588200).

Almost surely, 2^1311436056 is an apocalyptic number.

It is an amenable number.

1311436056 is an abundant number, since it is smaller than the sum of its proper divisors (2438208744).

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

1311436056 is a wasteful number, since it uses less digits than its factorization.

1311436056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5608 (or 5604 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 1311436056 is about 36213.7550662728. The cubic root of 1311436056 is about 1094.5838597193.

Adding to 1311436056 its reverse (6506341131), we get a palindrome (7817777187).

The spelling of 1311436056 in words is "one billion, three hundred eleven million, four hundred thirty-six thousand, fifty-six".