12778339 has 16 divisors (see below), whose sum is σ = 15579648. Its totient is φ = 10230912.

The previous prime is 12778333. The next prime is 12778351. The reversal of 12778339 is 93387721.

12778339 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12778339 - 2³ = 12778331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12778331) 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, 19552 + ... + 20194.

It is an arithmetic number, because the mean of its divisors is an integer number (973728).

Almost surely, 2^12778339 is an apocalyptic number.

12778339 is a deficient number, since it is larger than the sum of its proper divisors (2801309).

12778339 is a wasteful number, since it uses less digits than its factorization.

12778339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834.

The product of its digits is 63504, while the sum is 40.

The square root of 12778339 is about 3574.6802654223. The cubic root of 12778339 is about 233.7893921620.

The spelling of 12778339 in words is "twelve million, seven hundred seventy-eight thousand, three hundred thirty-nine".