1312026388 has 6 divisors (see below), whose sum is σ = 2296046186. Its totient is φ = 656013192.

The previous prime is 1312026383. The next prime is 1312026427. The reversal of 1312026388 is 8836202131.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1243831824 + 68194564 = 35268^2 + 8258^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312026383) by changing a digit.

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 as a sum of consecutive naturals, namely, 164003295 + ... + 164003302.

Almost surely, 2^1312026388 is an apocalyptic number.

It is an amenable number.

1312026388 is a deficient number, since it is larger than the sum of its proper divisors (984019798).

1312026388 is a wasteful number, since it uses less digits than its factorization.

1312026388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328006601 (or 328006599 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 1312026388 is about 36221.9048091069. The cubic root of 1312026388 is about 1094.7480743461.

The spelling of 1312026388 in words is "one billion, three hundred twelve million, twenty-six thousand, three hundred eighty-eight".