13988806 has 12 divisors (see below), whose sum is σ = 22722012. Its totient is φ = 6456216.

The previous prime is 13988801. The next prime is 13988813. The reversal of 13988806 is 60888931.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13988801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20356 + ... + 21031.

It is an arithmetic number, because the mean of its divisors is an integer number (1893501).

Almost surely, 2^13988806 is an apocalyptic number.

13988806 is a deficient number, since it is larger than the sum of its proper divisors (8733206).

13988806 is a wasteful number, since it uses less digits than its factorization.

13988806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41415 (or 41402 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 13988806 is about 3740.1612264714. The cubic root of 13988806 is about 240.9499732597.

The spelling of 13988806 in words is "thirteen million, nine hundred eighty-eight thousand, eight hundred six".