1311289896 has 32 divisors (see below), whose sum is σ = 3746543040. Its totient is φ = 374654208.

The previous prime is 1311289891. The next prime is 1311289901. The reversal of 1311289896 is 6989821131.

It is an interprime number because it is at equal distance from previous prime (1311289891) and next prime (1311289901).

It is not an unprimeable number, because it can be changed into a prime (1311289891) 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, 3902481 + ... + 3902816.

It is an arithmetic number, because the mean of its divisors is an integer number (117079470).

Almost surely, 2^1311289896 is an apocalyptic number.

It is an amenable number.

1311289896 is an abundant number, since it is smaller than the sum of its proper divisors (2435253144).

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

1311289896 is a wasteful number, since it uses less digits than its factorization.

1311289896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7805313 (or 7805309 counting only the distinct ones).

The product of its digits is 186624, while the sum is 48.

The square root of 1311289896 is about 36211.7369923068. The cubic root of 1311289896 is about 1094.5431942925.

The spelling of 1311289896 in words is "one billion, three hundred eleven million, two hundred eighty-nine thousand, eight hundred ninety-six".