1311772992 has 28 divisors (see below), whose sum is σ = 3470733216. Its totient is φ = 437257600.

The previous prime is 1311772933. The next prime is 1311772993. The reversal of 1311772992 is 2992771131.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311772993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3415884 + ... + 3416267.

Almost surely, 2^1311772992 is an apocalyptic number.

1311772992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1311772992 is an abundant number, since it is smaller than the sum of its proper divisors (2158960224).

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

1311772992 is an equidigital number, since it uses as much as digits as its factorization.

1311772992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6832166 (or 6832156 counting only the distinct ones).

The product of its digits is 47628, while the sum is 42.

The square root of 1311772992 is about 36218.4068120065. The cubic root of 1311772992 is about 1094.6775923684.

The spelling of 1311772992 in words is "one billion, three hundred eleven million, seven hundred seventy-two thousand, nine hundred ninety-two".