1312488128 has 112 divisors (see below), whose sum is σ = 3216859200. Its totient is φ = 529256448.

The previous prime is 1312488071. The next prime is 1312488143. The reversal of 1312488128 is 8218842131.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×1312488128² = 3445250172281888768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1312488091 and 1312488100.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 371426 + ... + 374942.

Almost surely, 2^1312488128 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 1312488128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1608429600).

1312488128 is an abundant number, since it is smaller than the sum of its proper divisors (1904371072).

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

1312488128 is an equidigital number, since it uses as much as digits as its factorization.

1312488128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3567 (or 3543 counting only the distinct ones).

The product of its digits is 24576, while the sum is 38.

The square root of 1312488128 is about 36228.2780159367. The cubic root of 1312488128 is about 1094.8764837778.

The spelling of 1312488128 in words is "one billion, three hundred twelve million, four hundred eighty-eight thousand, one hundred twenty-eight".