12978776 has 32 divisors (see below), whose sum is σ = 25779600. Its totient is φ = 6115200.

The previous prime is 12978773. The next prime is 12978809. The reversal of 12978776 is 67787921.

It is a self number, because there is not a number n which added to its sum of digits gives 12978776.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12978773) 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, 9326 + ... + 10626.

Almost surely, 2^12978776 is an apocalyptic number.

It is an amenable number.

12978776 is a deficient number, since it is larger than the sum of its proper divisors (12800824).

12978776 is a wasteful number, since it uses less digits than its factorization.

12978776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379 (or 1375 counting only the distinct ones).

The product of its digits is 296352, while the sum is 47.

The square root of 12978776 is about 3602.6068339468. The cubic root of 12978776 is about 235.0054382324.

The spelling of 12978776 in words is "twelve million, nine hundred seventy-eight thousand, seven hundred seventy-six".