12278336 has 28 divisors (see below), whose sum is σ = 27846528. Its totient is φ = 5261952.

The previous prime is 12278333. The next prime is 12278377. The reversal of 12278336 is 63387221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (28).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12278333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13256 + ... + 14151.

Almost surely, 2^12278336 is an apocalyptic number.

12278336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12278336 is an abundant number, since it is smaller than the sum of its proper divisors (15568192).

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

12278336 is an equidigital number, since it uses as much as digits as its factorization.

12278336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27426 (or 27416 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 12278336 is about 3504.0456618029. The cubic root of 12278336 is about 230.6994210265.

The spelling of 12278336 in words is "twelve million, two hundred seventy-eight thousand, three hundred thirty-six".