1312886428 has 12 divisors (see below), whose sum is σ = 2625772912. Its totient is φ = 562665600.

The previous prime is 1312886401. The next prime is 1312886473. The reversal of 1312886428 is 8246882131.

It is a happy number.

1312886428 is an admirable number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 23444373 + ... + 23444428.

Almost surely, 2^1312886428 is an apocalyptic number.

It is an amenable number.

1312886428 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1312886428 is a wasteful number, since it uses less digits than its factorization.

1312886428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46888812 (or 46888810 counting only the distinct ones).

The product of its digits is 147456, while the sum is 43.

The square root of 1312886428 is about 36233.7746860578. The cubic root of 1312886428 is about 1094.9872264170.

The spelling of 1312886428 in words is "one billion, three hundred twelve million, eight hundred eighty-six thousand, four hundred twenty-eight".