12278256 has 40 divisors (see below), whose sum is σ = 33390720. Its totient is φ = 3877056.

The previous prime is 12278249. The next prime is 12278257. The reversal of 12278256 is 65287221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12278257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5820 + ... + 7643.

It is an arithmetic number, because the mean of its divisors is an integer number (834768).

Almost surely, 2^12278256 is an apocalyptic number.

12278256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12278256 is an abundant number, since it is smaller than the sum of its proper divisors (21112464).

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

12278256 is a wasteful number, since it uses less digits than its factorization.

12278256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13493 (or 13487 counting only the distinct ones).

The product of its digits is 13440, while the sum is 33.

The square root of 12278256 is about 3504.0342464080. The cubic root of 12278256 is about 230.6989199816.

The spelling of 12278256 in words is "twelve million, two hundred seventy-eight thousand, two hundred fifty-six".