1312311028 has 48 divisors (see below), whose sum is σ = 2665062400. Its totient is φ = 553793760.

The previous prime is 1312310983. The next prime is 1312311029. The reversal of 1312311028 is 8201132131.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312311029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1262533 + ... + 1263571.

Almost surely, 2^1312311028 is an apocalyptic number.

It is an amenable number.

1312311028 is an abundant number, since it is smaller than the sum of its proper divisors (1352751372).

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

1312311028 is a wasteful number, since it uses less digits than its factorization.

1312311028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1700 (or 1698 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1312311028 is about 36225.8337102129. The cubic root of 1312311028 is about 1094.8272360060.

Adding to 1312311028 its reverse (8201132131), we get a palindrome (9513443159).

The spelling of 1312311028 in words is "one billion, three hundred twelve million, three hundred eleven thousand, twenty-eight".