12978992 has 40 divisors (see below), whose sum is σ = 28269024. Its totient is φ = 5727744.

The previous prime is 12978983. The next prime is 12979027. The reversal of 12978992 is 29987921.

It is a happy number.

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, 3428 + ... + 6140.

Almost surely, 2^12978992 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 12978992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14134512).

12978992 is an abundant number, since it is smaller than the sum of its proper divisors (15290032).

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

12978992 is a wasteful number, since it uses less digits than its factorization.

12978992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2757 (or 2751 counting only the distinct ones).

The product of its digits is 163296, while the sum is 47.

The square root of 12978992 is about 3602.6368121141. The cubic root of 12978992 is about 235.0067419222.

The spelling of 12978992 in words is "twelve million, nine hundred seventy-eight thousand, nine hundred ninety-two".