1311340444 has 24 divisors (see below), whose sum is σ = 2383269840. Its totient is φ = 630583296.

The previous prime is 1311340417. The next prime is 1311340477. The reversal of 1311340444 is 4440431131.

It is a super-2 number, since 2×1311340444² = 3439227520140234272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7819 + ... + 51805.

It is an arithmetic number, because the mean of its divisors is an integer number (99302910).

Almost surely, 2^1311340444 is an apocalyptic number.

It is an amenable number.

1311340444 is a deficient number, since it is larger than the sum of its proper divisors (1071929396).

1311340444 is a wasteful number, since it uses less digits than its factorization.

1311340444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44277 (or 44275 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 1311340444 is about 36212.4349360824. The cubic root of 1311340444 is about 1094.5572583726.

Adding to 1311340444 its reverse (4440431131), we get a palindrome (5751771575).

The spelling of 1311340444 in words is "one billion, three hundred eleven million, three hundred forty thousand, four hundred forty-four".