13689680 has 40 divisors (see below), whose sum is σ = 32018784. Its totient is φ = 5443200.

The previous prime is 13689677. The next prime is 13689691. The reversal of 13689680 is 8698631.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16475 + ... + 17285.

Almost surely, 2^13689680 is an apocalyptic number.

13689680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13689680 is an abundant number, since it is smaller than the sum of its proper divisors (18329104).

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

13689680 is a wasteful number, since it uses less digits than its factorization.

13689680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035 (or 1029 counting only the distinct ones).

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

The square root of 13689680 is about 3699.9567565041. The cubic root of 13689680 is about 239.2201539303.

The spelling of 13689680 in words is "thirteen million, six hundred eighty-nine thousand, six hundred eighty".