13603856 has 40 divisors (see below), whose sum is σ = 31438464. Its totient is φ = 5575680.

The previous prime is 13603853. The next prime is 13603861. The reversal of 13603856 is 65830631.

13603856 = T₁₉₆₈ + T₁₉₆₉ + ... + T₁₉₇₄.

It is not an unprimeable number, because it can be changed into a prime (13603853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65 + ... + 5216.

Almost surely, 2^13603856 is an apocalyptic number.

13603856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13603856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15719232).

13603856 is an abundant number, since it is smaller than the sum of its proper divisors (17834608).

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

13603856 is a wasteful number, since it uses less digits than its factorization.

13603856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5319 (or 5313 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 13603856 is about 3688.3405482683. The cubic root of 13603856 is about 238.7191954262.

The spelling of 13603856 in words is "thirteen million, six hundred three thousand, eight hundred fifty-six".