1311649344 has 84 divisors (see below), whose sum is σ = 3957513040. Its totient is φ = 414201600.

The previous prime is 1311649333. The next prime is 1311649369. The reversal of 1311649344 is 4439461131.

1311649344 is a `hidden beast` number, since 1 + 3 + 1 + 1 + 649 + 3 + 4 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1311649299 and 1311649308.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48982 + ... + 70869.

Almost surely, 2^1311649344 is an apocalyptic number.

It is an amenable number.

1311649344 is an abundant number, since it is smaller than the sum of its proper divisors (2645863696).

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

1311649344 is a wasteful number, since it uses less digits than its factorization.

1311649344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119888 (or 119875 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 1311649344 is about 36216.6997944318. The cubic root of 1311649344 is about 1094.6431964405.

The spelling of 1311649344 in words is "one billion, three hundred eleven million, six hundred forty-nine thousand, three hundred forty-four".