1311314440 has 16 divisors (see below), whose sum is σ = 2950457580. Its totient is φ = 524525760.

The previous prime is 1311314413. The next prime is 1311314449. The reversal of 1311314440 is 444131131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1253584836 + 57729604 = 35406^2 + 7598^2 .

It is not an unprimeable number, because it can be changed into a prime (1311314449) 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, 16391391 + ... + 16391470.

Almost surely, 2^1311314440 is an apocalyptic number.

1311314440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311314440 is an abundant number, since it is smaller than the sum of its proper divisors (1639143140).

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

1311314440 is a wasteful number, since it uses less digits than its factorization.

1311314440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32782872 (or 32782868 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1311314440 is about 36212.0758863670. The cubic root of 1311314440 is about 1094.5500232682.

Adding to 1311314440 its reverse (444131131), we get a palindrome (1755445571).

The spelling of 1311314440 in words is "one billion, three hundred eleven million, three hundred fourteen thousand, four hundred forty".