12978744 has 16 divisors (see below), whose sum is σ = 32446920. Its totient is φ = 4326240.

The previous prime is 12978737. The next prime is 12978773. The reversal of 12978744 is 44787921.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12978696 and 12978705.

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, 270367 + ... + 270414.

Almost surely, 2^12978744 is an apocalyptic number.

It is an amenable number.

12978744 is an abundant number, since it is smaller than the sum of its proper divisors (19468176).

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

12978744 is a wasteful number, since it uses less digits than its factorization.

12978744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540790 (or 540786 counting only the distinct ones).

The product of its digits is 112896, while the sum is 42.

The square root of 12978744 is about 3602.6023927156. The cubic root of 12978744 is about 235.0052450919.

The spelling of 12978744 in words is "twelve million, nine hundred seventy-eight thousand, seven hundred forty-four".