1312352788 has 12 divisors (see below), whose sum is σ = 2297795220. Its totient is φ = 655839872.

The previous prime is 1312352773. The next prime is 1312352801. The reversal of 1312352788 is 8872532131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 513838224 + 798514564 = 22668^2 + 28258^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1312352788.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75253 + ... + 91036.

It is an arithmetic number, because the mean of its divisors is an integer number (191482935).

Almost surely, 2^1312352788 is an apocalyptic number.

It is an amenable number.

1312352788 is a deficient number, since it is larger than the sum of its proper divisors (985442432).

1312352788 is a wasteful number, since it uses less digits than its factorization.

1312352788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168266 (or 168264 counting only the distinct ones).

The product of its digits is 80640, while the sum is 40.

The square root of 1312352788 is about 36226.4100898778. The cubic root of 1312352788 is about 1094.8388489798.

The spelling of 1312352788 in words is "one billion, three hundred twelve million, three hundred fifty-two thousand, seven hundred eighty-eight".