12778367 has 12 divisors (see below), whose sum is σ = 15078096. Its totient is φ = 10795680.

The previous prime is 12778361. The next prime is 12778369. The reversal of 12778367 is 76387721.

It is not a de Polignac number, because 12778367 - 2⁴ = 12778351 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12778361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1643 + ... + 5315.

It is an arithmetic number, because the mean of its divisors is an integer number (1256508).

Almost surely, 2^12778367 is an apocalyptic number.

12778367 is a deficient number, since it is larger than the sum of its proper divisors (2299729).

12778367 is an equidigital number, since it uses as much as digits as its factorization.

12778367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3758 (or 3751 counting only the distinct ones).

The product of its digits is 98784, while the sum is 41.

The square root of 12778367 is about 3574.6841818544. The cubic root of 12778367 is about 233.7895629223.

The spelling of 12778367 in words is "twelve million, seven hundred seventy-eight thousand, three hundred sixty-seven".