13663940 has 24 divisors (see below), whose sum is σ = 28873152. Its totient is φ = 5431520.

The previous prime is 13663933. The next prime is 13663943. The reversal of 13663940 is 4936631.

It is a happy number.

13663940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 13663897 and 13663906.

It is not an unprimeable number, because it can be changed into a prime (13663943) 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, 1295 + ... + 5385.

It is an arithmetic number, because the mean of its divisors is an integer number (1203048).

Almost surely, 2^13663940 is an apocalyptic number.

13663940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13663940 is an abundant number, since it is smaller than the sum of its proper divisors (15209212).

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

13663940 is a wasteful number, since it uses less digits than its factorization.

13663940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4267 (or 4265 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 13663940 is about 3696.4767008599. The cubic root of 13663940 is about 239.0701287525.

The spelling of 13663940 in words is "thirteen million, six hundred sixty-three thousand, nine hundred forty".