13000056 has 16 divisors (see below), whose sum is σ = 32500200. Its totient is φ = 4333344.

The previous prime is 13000049. The next prime is 13000069. The reversal of 13000056 is 65000031.

It is a junction number, because it is equal to n+sod(n) for n = 12999999 and 13000044.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270811 + ... + 270858.

Almost surely, 2^13000056 is an apocalyptic number.

It is an amenable number.

13000056 is an abundant number, since it is smaller than the sum of its proper divisors (19500144).

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

13000056 is a wasteful number, since it uses less digits than its factorization.

13000056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541678 (or 541674 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 13000056 is about 3605.5590412584. The cubic root of 13000056 is about 235.1338063991.

Adding to 13000056 its reverse (65000031), we get a palindrome (78000087).

The spelling of 13000056 in words is "thirteen million, fifty-six", and thus it is an aban number and an uban number.