13613856 has 24 divisors (see below), whose sum is σ = 35736624. Its totient is φ = 4537920.

The previous prime is 13613813. The next prime is 13613857. The reversal of 13613856 is 65831631.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (13613857) by changing a digit.

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, 70810 + ... + 71001.

It is an arithmetic number, because the mean of its divisors is an integer number (1489026).

Almost surely, 2^13613856 is an apocalyptic number.

13613856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13613856 is an abundant number, since it is smaller than the sum of its proper divisors (22122768).

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

13613856 is a wasteful number, since it uses less digits than its factorization.

13613856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141824 (or 141816 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 13613856 is about 3689.6959224305. The cubic root of 13613856 is about 238.7776741218. Note that the first 3 decimals are identical.

The spelling of 13613856 in words is "thirteen million, six hundred thirteen thousand, eight hundred fifty-six".