12775878 has 24 divisors (see below), whose sum is σ = 28430688. Its totient is φ = 4143312.

The previous prime is 12775871. The next prime is 12775913. The reversal of 12775878 is 87857721.

12775878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12775871) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8926 + ... + 10257.

It is an arithmetic number, because the mean of its divisors is an integer number (1184612).

Almost surely, 2^12775878 is an apocalyptic number.

12775878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12775878 is an abundant number, since it is smaller than the sum of its proper divisors (15654810).

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

12775878 is a wasteful number, since it uses less digits than its factorization.

12775878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19228 (or 19225 counting only the distinct ones).

The product of its digits is 219520, while the sum is 45.

The square root of 12775878 is about 3574.3360222564. The cubic root of 12775878 is about 233.7743825786.

The spelling of 12775878 in words is "twelve million, seven hundred seventy-five thousand, eight hundred seventy-eight".