12731992 has 32 divisors (see below), whose sum is σ = 29383200. Its totient is φ = 5036544.

The previous prime is 12731989. The next prime is 12731993. The reversal of 12731992 is 29913721.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12731993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8017 + ... + 9472.

It is an arithmetic number, because the mean of its divisors is an integer number (918225).

Almost surely, 2^12731992 is an apocalyptic number.

It is an amenable number.

12731992 is an abundant number, since it is smaller than the sum of its proper divisors (16651208).

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

12731992 is a wasteful number, since it uses less digits than its factorization.

12731992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17515 (or 17511 counting only the distinct ones).

The product of its digits is 6804, while the sum is 34.

The square root of 12731992 is about 3568.1916988861. The cubic root of 12731992 is about 233.5063985885.

The spelling of 12731992 in words is "twelve million, seven hundred thirty-one thousand, nine hundred ninety-two".