1311896428 has 12 divisors (see below), whose sum is σ = 2297090880. Its totient is φ = 655584752.

The previous prime is 1311896419. The next prime is 1311896437. The reversal of 1311896428 is 8246981131.

It is an interprime number because it is at equal distance from previous prime (1311896419) and next prime (1311896437).

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 3 ways as a sum of consecutive naturals, for example, 82663 + ... + 97246.

It is an arithmetic number, because the mean of its divisors is an integer number (191424240).

Almost surely, 2^1311896428 is an apocalyptic number.

It is an amenable number.

1311896428 is a deficient number, since it is larger than the sum of its proper divisors (985194452).

1311896428 is a wasteful number, since it uses less digits than its factorization.

1311896428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181736 (or 181734 counting only the distinct ones).

The product of its digits is 82944, while the sum is 43.

The square root of 1311896428 is about 36220.1108225803. The cubic root of 1311896428 is about 1094.7119271672.

The spelling of 1311896428 in words is "one billion, three hundred eleven million, eight hundred ninety-six thousand, four hundred twenty-eight".