12428256 has 24 divisors (see below), whose sum is σ = 32624424. Its totient is φ = 4142720.

The previous prime is 12428243. The next prime is 12428279. The reversal of 12428256 is 65282421.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64635 + ... + 64826.

It is an arithmetic number, because the mean of its divisors is an integer number (1359351).

Almost surely, 2^12428256 is an apocalyptic number.

12428256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12428256 is an abundant number, since it is smaller than the sum of its proper divisors (20196168).

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

12428256 is a wasteful number, since it uses less digits than its factorization.

12428256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129474 (or 129466 counting only the distinct ones).

The product of its digits is 7680, while the sum is 30.

The square root of 12428256 is about 3525.3731717366. The cubic root of 12428256 is about 231.6345812979.

The spelling of 12428256 in words is "twelve million, four hundred twenty-eight thousand, two hundred fifty-six".