12979878 has 16 divisors (see below), whose sum is σ = 26855280. Its totient is φ = 4177376.

The previous prime is 12979877. The next prime is 12979909. The reversal of 12979878 is 87897921.

It is a self number, because there is not a number n which added to its sum of digits gives 12979878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12979877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37125 + ... + 37472.

It is an arithmetic number, because the mean of its divisors is an integer number (1678455).

Almost surely, 2^12979878 is an apocalyptic number.

12979878 is an abundant number, since it is smaller than the sum of its proper divisors (13875402).

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

12979878 is a wasteful number, since it uses less digits than its factorization.

12979878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74631.

The product of its digits is 508032, while the sum is 51.

The square root of 12979878 is about 3602.7597755054. The cubic root of 12979878 is about 235.0120893132.

It can be divided in two parts, 1297 and 9878, that added together give a triangular number (11175 = T₁₄₉).

The spelling of 12979878 in words is "twelve million, nine hundred seventy-nine thousand, eight hundred seventy-eight".