13286556 has 18 divisors (see below), whose sum is σ = 33585552. Its totient is φ = 4428840.

The previous prime is 13286549. The next prime is 13286561. The reversal of 13286556 is 65568231.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×13286556² = 353065140682272, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 369071 = 13286556 / (1 + 3 + 2 + 8 + 6 + 5 + 5 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 13286556.

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 5 ways as a sum of consecutive naturals, for example, 184500 + ... + 184571.

It is an arithmetic number, because the mean of its divisors is an integer number (1865864).

Almost surely, 2^13286556 is an apocalyptic number.

It is an amenable number.

13286556 is an abundant number, since it is smaller than the sum of its proper divisors (20298996).

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

13286556 is a wasteful number, since it uses less digits than its factorization.

13286556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369081 (or 369076 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 13286556 is about 3645.0728387784. The cubic root of 13286556 is about 236.8485920718.

The spelling of 13286556 in words is "thirteen million, two hundred eighty-six thousand, five hundred fifty-six".