13603656 has 48 divisors (see below), whose sum is σ = 37265040. Its totient is φ = 4104160.

The previous prime is 13603643. The next prime is 13603657. The reversal of 13603656 is 65630631.

13603656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (13603657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59815 + ... + 60041.

It is an arithmetic number, because the mean of its divisors is an integer number (776355).

Almost surely, 2^13603656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13603656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18632520).

13603656 is an abundant number, since it is smaller than the sum of its proper divisors (23661384).

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

13603656 is a wasteful number, since it uses less digits than its factorization.

13603656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 13603656 is about 3688.3134357047. The cubic root of 13603656 is about 238.7180255601.

The spelling of 13603656 in words is "thirteen million, six hundred three thousand, six hundred fifty-six".