13688748 has 36 divisors (see below), whose sum is σ = 34714680. Its totient is φ = 4548096.

The previous prime is 13688699. The next prime is 13688761. The reversal of 13688748 is 84788631.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20443 + ... + 21101.

Almost surely, 2^13688748 is an apocalyptic number.

13688748 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

13688748 is an abundant number, since it is smaller than the sum of its proper divisors (21025932).

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

13688748 is a wasteful number, since it uses less digits than its factorization.

13688748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246 (or 1241 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 13688748 is about 3699.8308069424. The cubic root of 13688748 is about 239.2147250660.

The spelling of 13688748 in words is "thirteen million, six hundred eighty-eight thousand, seven hundred forty-eight".