13863866 has 8 divisors (see below), whose sum is σ = 21002004. Its totient is φ = 6863200.

The previous prime is 13863799. The next prime is 13863907. The reversal of 13863866 is 66836831.

It can be written as a sum of positive squares in 2 ways, for example, as 11526025 + 2337841 = 3395^2 + 1529^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34115 + ... + 34518.

Almost surely, 2^13863866 is an apocalyptic number.

13863866 is a deficient number, since it is larger than the sum of its proper divisors (7138138).

13863866 is a wasteful number, since it uses less digits than its factorization.

13863866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68736.

The product of its digits is 124416, while the sum is 41.

The square root of 13863866 is about 3723.4212761921. The cubic root of 13863866 is about 240.2304846012.

The spelling of 13863866 in words is "thirteen million, eight hundred sixty-three thousand, eight hundred sixty-six".