13656538 has 16 divisors (see below), whose sum is σ = 23506560. Its totient is φ = 5828976.

The previous prime is 13656529. The next prime is 13656551. The reversal of 13656538 is 83565631.

It is a junction number, because it is equal to n+sod(n) for n = 13656497 and 13656506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1828 + ... + 5536.

It is an arithmetic number, because the mean of its divisors is an integer number (1469160).

Almost surely, 2^13656538 is an apocalyptic number.

13656538 is a deficient number, since it is larger than the sum of its proper divisors (9850022).

13656538 is a wasteful number, since it uses less digits than its factorization.

13656538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3981.

The product of its digits is 64800, while the sum is 37.

The square root of 13656538 is about 3695.4753415494. The cubic root of 13656538 is about 239.0269514374.

The spelling of 13656538 in words is "thirteen million, six hundred fifty-six thousand, five hundred thirty-eight".