1311333996 has 96 divisors (see below), whose sum is σ = 3595737600. Its totient is φ = 364147200.

The previous prime is 1311333971. The next prime is 1311334021. The reversal of 1311333996 is 6993331131.

It is an interprime number because it is at equal distance from previous prime (1311333971) and next prime (1311334021).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1201411 + ... + 1202501.

It is an arithmetic number, because the mean of its divisors is an integer number (37455600).

Almost surely, 2^1311333996 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1311333996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1797868800).

1311333996 is an abundant number, since it is smaller than the sum of its proper divisors (2284403604).

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

1311333996 is a wasteful number, since it uses less digits than its factorization.

1311333996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495 (or 1493 counting only the distinct ones).

The product of its digits is 39366, while the sum is 39.

The square root of 1311333996 is about 36212.3459057819. The cubic root of 1311333996 is about 1094.5554643516. Note that the first 3 decimals are identical.

The spelling of 1311333996 in words is "one billion, three hundred eleven million, three hundred thirty-three thousand, nine hundred ninety-six".