12778355 has 16 divisors (see below), whose sum is σ = 16665600. Its totient is φ = 9370080.

The previous prime is 12778351. The next prime is 12778361. The reversal of 12778355 is 55387721.

It is a happy number.

12778355 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12778355 - 2² = 12778351 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (12778351) 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, 776 + ... + 5114.

It is an arithmetic number, because the mean of its divisors is an integer number (1041600).

Almost surely, 2^12778355 is an apocalyptic number.

12778355 is a deficient number, since it is larger than the sum of its proper divisors (3887245).

12778355 is a wasteful number, since it uses less digits than its factorization.

12778355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4394.

The product of its digits is 58800, while the sum is 38.

The square root of 12778355 is about 3574.6825033840. The cubic root of 12778355 is about 233.7894897393.

The spelling of 12778355 in words is "twelve million, seven hundred seventy-eight thousand, three hundred fifty-five".