12566428 has 12 divisors (see below), whose sum is σ = 25132912. Its totient is φ = 5385600.

The previous prime is 12566419. The next prime is 12566473. The reversal of 12566428 is 82466521.

12566428 is an admirable number.

It is a super-2 number, since 2×12566428² = 315830225358368, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 12566393 and 12566402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224373 + ... + 224428.

Almost surely, 2^12566428 is an apocalyptic number.

It is an amenable number.

12566428 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12566428 is a wasteful number, since it uses less digits than its factorization.

12566428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448812 (or 448810 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 12566428 is about 3544.9157958970. The cubic root of 12566428 is about 232.4898241972.

The spelling of 12566428 in words is "twelve million, five hundred sixty-six thousand, four hundred twenty-eight".