12508428 has 12 divisors (see below), whose sum is σ = 29186360. Its totient is φ = 4169472.

The previous prime is 12508421. The next prime is 12508453. The reversal of 12508428 is 82480521.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) 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 = 12508395 and 12508404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12508421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 521173 + ... + 521196.

Almost surely, 2^12508428 is an apocalyptic number.

It is an amenable number.

12508428 is an abundant number, since it is smaller than the sum of its proper divisors (16677932).

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

12508428 is a wasteful number, since it uses less digits than its factorization.

12508428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042376 (or 1042374 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 12508428 is about 3536.7256042843. The cubic root of 12508428 is about 232.1315890434.

Adding to 12508428 its reverse (82480521), we get a palindrome (94988949).

The spelling of 12508428 in words is "twelve million, five hundred eight thousand, four hundred twenty-eight".