12778704 has 30 divisors (see below), whose sum is σ = 35763026. Its totient is φ = 4259520.

The previous prime is 12778693. The next prime is 12778729. The reversal of 12778704 is 40787721.

Added to its reverse (40787721) it gives a triangular number (53566425 = T₁₀₃₅₀).

12778704 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 9363600 + 3415104 = 3060^2 + 1848^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44227 + ... + 44514.

Almost surely, 2^12778704 is an apocalyptic number.

It is an amenable number.

12778704 is an abundant number, since it is smaller than the sum of its proper divisors (22984322).

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

12778704 is a wasteful number, since it uses less digits than its factorization.

12778704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88755 (or 88746 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 36.

The square root of 12778704 is about 3574.7313185749. The cubic root of 12778704 is about 233.7916181246.

Adding to 12778704 its reverse (40787721), we get a triangular number (53566425 = T₁₀₃₅₀).

The spelling of 12778704 in words is "twelve million, seven hundred seventy-eight thousand, seven hundred four".