1312647828 has 24 divisors (see below), whose sum is σ = 3097261440. Its totient is φ = 432632640.

The previous prime is 1312647823. The next prime is 1312647863. The reversal of 1312647828 is 8287462131.

It is a self number, because there is not a number n which added to its sum of digits gives 1312647828.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312647823) 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, 613468 + ... + 615603.

It is an arithmetic number, because the mean of its divisors is an integer number (129052560).

Almost surely, 2^1312647828 is an apocalyptic number.

It is an amenable number.

1312647828 is an abundant number, since it is smaller than the sum of its proper divisors (1784613612).

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

1312647828 is a wasteful number, since it uses less digits than its factorization.

1312647828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229167 (or 1229165 counting only the distinct ones).

The product of its digits is 129024, while the sum is 42.

The square root of 1312647828 is about 36230.4820282590. The cubic root of 1312647828 is about 1094.9208891784.

The spelling of 1312647828 in words is "one billion, three hundred twelve million, six hundred forty-seven thousand, eight hundred twenty-eight".