12878393 has 6 divisors (see below), whose sum is σ = 14155722. Its totient is φ = 11707520.

The previous prime is 12878377. The next prime is 12878431. The reversal of 12878393 is 39387821.

It can be written as a sum of positive squares in only one way, i.e., 11854249 + 1024144 = 3443^2 + 1012^2 .

It is not a de Polignac number, because 12878393 - 2⁴ = 12878377 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12878393.

It is not an unprimeable number, because it can be changed into a prime (12878303) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53096 + ... + 53337.

It is an arithmetic number, because the mean of its divisors is an integer number (2359287).

Almost surely, 2^12878393 is an apocalyptic number.

It is an amenable number.

12878393 is a deficient number, since it is larger than the sum of its proper divisors (1277329).

12878393 is a wasteful number, since it uses less digits than its factorization.

12878393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106455 (or 106444 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The square root of 12878393 is about 3588.6477954795. The cubic root of 12878393 is about 234.3979943780.

The spelling of 12878393 in words is "twelve million, eight hundred seventy-eight thousand, three hundred ninety-three".