12778944 has 112 divisors (see below), whose sum is σ = 37063680. Its totient is φ = 3870720.

The previous prime is 12778943. The next prime is 12778967. The reversal of 12778944 is 44987721.

It is a happy number.

12778944 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Its product of digits (112896) is a multiple of the sum of its prime divisors (168).

It is a junction number, because it is equal to n+sod(n) for n = 12778896 and 12778905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12778943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113032 + ... + 113144.

Almost surely, 2^12778944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12778944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18531840).

12778944 is an abundant number, since it is smaller than the sum of its proper divisors (24284736).

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

12778944 is a wasteful number, since it uses less digits than its factorization.

12778944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 168 counting only the distinct ones).

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

The square root of 12778944 is about 3574.7648873737. The cubic root of 12778944 is about 233.7930817482.

The spelling of 12778944 in words is "twelve million, seven hundred seventy-eight thousand, nine hundred forty-four".