12878439 has 16 divisors (see below), whose sum is σ = 19680000. Its totient is φ = 7338240.

The previous prime is 12878431. The next prime is 12878483. The reversal of 12878439 is 93487821.

It is not a de Polignac number, because 12878439 - 2³ = 12878431 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12878439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12878431) 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, 9687 + ... + 10935.

It is an arithmetic number, because the mean of its divisors is an integer number (1230000).

Almost surely, 2^12878439 is an apocalyptic number.

12878439 is a deficient number, since it is larger than the sum of its proper divisors (6801561).

12878439 is a wasteful number, since it uses less digits than its factorization.

12878439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750.

The product of its digits is 96768, while the sum is 42.

The square root of 12878439 is about 3588.6542045731. The cubic root of 12878439 is about 234.3982734578.

The spelling of 12878439 in words is "twelve million, eight hundred seventy-eight thousand, four hundred thirty-nine".