1311402312 has 80 divisors (see below), whose sum is σ = 4007084400. Its totient is φ = 397392480.

The previous prime is 1311402299. The next prime is 1311402329. The reversal of 1311402312 is 2132041131.

1311402312 is a `hidden beast` number, since 1 + 311 + 40 + 2 + 312 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 84862 + ... + 99117.

It is an arithmetic number, because the mean of its divisors is an integer number (50088555).

Almost surely, 2^1311402312 is an apocalyptic number.

1311402312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1311402312 is an abundant number, since it is smaller than the sum of its proper divisors (2695682088).

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

1311402312 is a wasteful number, since it uses less digits than its factorization.

1311402312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184008 (or 183995 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1311402312 is about 36213.2891629578. The cubic root of 1311402312 is about 1094.5744715491.

Adding to 1311402312 its reverse (2132041131), we get a palindrome (3443443443).

The spelling of 1311402312 in words is "one billion, three hundred eleven million, four hundred two thousand, three hundred twelve".