1291168992 has 24 divisors (see below), whose sum is σ = 3389318856. Its totient is φ = 430389632.

The previous prime is 1291168979. The next prime is 1291169021. The reversal of 1291168992 is 2998611921.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 6724743 + ... + 6724934.

It is an arithmetic number, because the mean of its divisors is an integer number (141221619).

Almost surely, 2^1291168992 is an apocalyptic number.

1291168992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1291168992 is an abundant number, since it is smaller than the sum of its proper divisors (2098149864).

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

1291168992 is a wasteful number, since it uses less digits than its factorization.

1291168992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13449690 (or 13449682 counting only the distinct ones).

The product of its digits is 139968, while the sum is 48.

The square root of 1291168992 is about 35932.8400213509. The cubic root of 1291168992 is about 1088.9159584058.

The spelling of 1291168992 in words is "one billion, two hundred ninety-one million, one hundred sixty-eight thousand, nine hundred ninety-two".