1311611344 has 40 divisors (see below), whose sum is σ = 2679337440. Its totient is φ = 620281728.

The previous prime is 1311611311. The next prime is 1311611347. The reversal of 1311611344 is 4431161131.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311611347) 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, 204474 + ... + 210790.

It is an arithmetic number, because the mean of its divisors is an integer number (66983436).

Almost surely, 2^1311611344 is an apocalyptic number.

It is an amenable number.

1311611344 is an abundant number, since it is smaller than the sum of its proper divisors (1367726096).

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

1311611344 is a wasteful number, since it uses less digits than its factorization.

1311611344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7027 (or 7021 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 1311611344 is about 36216.1751707714. The cubic root of 1311611344 is about 1094.6326253115.

Adding to 1311611344 its reverse (4431161131), we get a palindrome (5742772475).

The spelling of 1311611344 in words is "one billion, three hundred eleven million, six hundred eleven thousand, three hundred forty-four".