12778336 has 24 divisors (see below), whose sum is σ = 26482680. Its totient is φ = 6052608.

The previous prime is 12778333. The next prime is 12778351. The reversal of 12778336 is 63387721.

12778336 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12778295 and 12778304.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 9901 + ... + 11116.

It is an arithmetic number, because the mean of its divisors is an integer number (1103445).

Almost surely, 2^12778336 is an apocalyptic number.

12778336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12778336 is an abundant number, since it is smaller than the sum of its proper divisors (13704344).

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

12778336 is a wasteful number, since it uses less digits than its factorization.

12778336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21046 (or 21038 counting only the distinct ones).

The product of its digits is 42336, while the sum is 37.

The square root of 12778336 is about 3574.6798458044. The cubic root of 12778336 is about 233.7893738662.

The spelling of 12778336 in words is "twelve million, seven hundred seventy-eight thousand, three hundred thirty-six".