12778936 has 16 divisors (see below), whose sum is σ = 24413400. Its totient is φ = 6268704.

The previous prime is 12778933. The next prime is 12778943. The reversal of 12778936 is 63987721.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12778892 and 12778901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12778933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14646 + ... + 15493.

Almost surely, 2^12778936 is an apocalyptic number.

It is an amenable number.

12778936 is a deficient number, since it is larger than the sum of its proper divisors (11634464).

12778936 is a wasteful number, since it uses less digits than its factorization.

12778936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30198 (or 30194 counting only the distinct ones).

The product of its digits is 127008, while the sum is 43.

The square root of 12778936 is about 3574.7637684188. The cubic root of 12778936 is about 233.7930329611.

The spelling of 12778936 in words is "twelve million, seven hundred seventy-eight thousand, nine hundred thirty-six".