13906688 has 18 divisors (see below), whose sum is σ = 27759564. Its totient is φ = 6953216.

The previous prime is 13906687. The next prime is 13906691. The reversal of 13906688 is 88660931.

It is a happy number.

It is a super-2 number, since 2×13906688² = 386791942258688, which contains 22 as substring.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (13906681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26906 + ... + 27417.

It is an arithmetic number, because the mean of its divisors is an integer number (1542198).

Almost surely, 2^13906688 is an apocalyptic number.

It is an amenable number.

13906688 is a deficient number, since it is larger than the sum of its proper divisors (13852876).

13906688 is an frugal number, since it uses more digits than its factorization.

13906688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54339 (or 54325 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 13906688 is about 3729.1671992551. The cubic root of 13906688 is about 240.4775675932.

The spelling of 13906688 in words is "thirteen million, nine hundred six thousand, six hundred eighty-eight".