12890056 has 32 divisors (see below), whose sum is σ = 25668000. Its totient is φ = 6051456.

The previous prime is 12890047. The next prime is 12890071. The reversal of 12890056 is 65009821.

12890056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20515 + ... + 21133.

It is an arithmetic number, because the mean of its divisors is an integer number (802125).

Almost surely, 2^12890056 is an apocalyptic number.

It is an amenable number.

12890056 is a deficient number, since it is larger than the sum of its proper divisors (12777944).

12890056 is a wasteful number, since it uses less digits than its factorization.

12890056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781 (or 777 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 12890056 is about 3590.2724130628. The cubic root of 12890056 is about 234.4687319554.

Adding to 12890056 its reverse (65009821), we get a palindrome (77899877).

The spelling of 12890056 in words is "twelve million, eight hundred ninety thousand, fifty-six".