12856428 has 48 divisors (see below), whose sum is σ = 35899360. Its totient is φ = 3955392.

The previous prime is 12856423. The next prime is 12856447. The reversal of 12856428 is 82465821.

12856428 is a `hidden beast` number, since 1 + 2 + 8 + 5 + 642 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 12856392 and 12856401.

It is not an unprimeable number, because it can be changed into a prime (12856423) 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, 3175 + ... + 5982.

Almost surely, 2^12856428 is an apocalyptic number.

12856428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12856428 is an abundant number, since it is smaller than the sum of its proper divisors (23042932).

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

12856428 is a wasteful number, since it uses less digits than its factorization.

12856428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9183 (or 9175 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 12856428 is about 3585.5861445515. The cubic root of 12856428 is about 234.2646578198.

The spelling of 12856428 in words is "twelve million, eight hundred fifty-six thousand, four hundred twenty-eight".