12087428 has 12 divisors (see below), whose sum is σ = 21283920. Its totient is φ = 6006312.

The previous prime is 12087421. The next prime is 12087431. The reversal of 12087428 is 82478021.

It is a super-2 number, since 2×12087428² = 292211831310368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12087394 and 12087403.

It is not an unprimeable number, because it can be changed into a prime (12087421) 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, 8618 + ... + 9921.

It is an arithmetic number, because the mean of its divisors is an integer number (1773660).

Almost surely, 2^12087428 is an apocalyptic number.

It is an amenable number.

12087428 is a deficient number, since it is larger than the sum of its proper divisors (9196492).

12087428 is a wasteful number, since it uses less digits than its factorization.

12087428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18706 (or 18704 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 12087428 is about 3476.6978586009. The cubic root of 12087428 is about 229.4975040984.

The spelling of 12087428 in words is "twelve million, eighty-seven thousand, four hundred twenty-eight".