13749568 has 56 divisors (see below), whose sum is σ = 31894272. Its totient is φ = 5758464.

The previous prime is 13749557. The next prime is 13749569. The reversal of 13749568 is 86594731.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13749569) 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, 20730 + ... + 21382.

Almost surely, 2^13749568 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 13749568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15947136).

13749568 is an abundant number, since it is smaller than the sum of its proper divisors (18144704).

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

13749568 is an equidigital number, since it uses as much as digits as its factorization.

13749568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719 (or 709 counting only the distinct ones).

The product of its digits is 181440, while the sum is 43.

The square root of 13749568 is about 3708.0409922222. The cubic root of 13749568 is about 239.5684838652.

The spelling of 13749568 in words is "thirteen million, seven hundred forty-nine thousand, five hundred sixty-eight".