12647992 has 32 divisors (see below), whose sum is σ = 27515520. Its totient is φ = 5338080.

The previous prime is 12647989. The next prime is 12648001. The reversal of 12647992 is 29974621.

12647992 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2067 + ... + 5437.

It is an arithmetic number, because the mean of its divisors is an integer number (859860).

Almost surely, 2^12647992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12647992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13757760).

12647992 is an abundant number, since it is smaller than the sum of its proper divisors (14867528).

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

12647992 is a wasteful number, since it uses less digits than its factorization.

12647992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3451 (or 3447 counting only the distinct ones).

The product of its digits is 54432, while the sum is 40.

The square root of 12647992 is about 3556.4015521310. The cubic root of 12647992 is about 232.9917414352.

The spelling of 12647992 in words is "twelve million, six hundred forty-seven thousand, nine hundred ninety-two".