13909680 has 60 divisors (see below), whose sum is σ = 46715760. Its totient is φ = 3709056.

The previous prime is 13909673. The next prime is 13909699. The reversal of 13909680 is 8690931.

13909680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (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, 8940 + ... + 10379.

It is an arithmetic number, because the mean of its divisors is an integer number (778596).

Almost surely, 2^13909680 is an apocalyptic number.

13909680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13909680 is an abundant number, since it is smaller than the sum of its proper divisors (32806080).

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

13909680 is a wasteful number, since it uses less digits than its factorization.

13909680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19338 (or 19329 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 13909680 is about 3729.5683396340. The cubic root of 13909680 is about 240.4948124682.

The spelling of 13909680 in words is "thirteen million, nine hundred nine thousand, six hundred eighty".