13983638 has 4 divisors (see below), whose sum is σ = 20975460. Its totient is φ = 6991818.

The previous prime is 13983587. The next prime is 13983647. The reversal of 13983638 is 83638931.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 13983595 and 13983604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3495908 + ... + 3495911.

It is an arithmetic number, because the mean of its divisors is an integer number (5243865).

Almost surely, 2^13983638 is an apocalyptic number.

13983638 is a deficient number, since it is larger than the sum of its proper divisors (6991822).

13983638 is an equidigital number, since it uses as much as digits as its factorization.

13983638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6991821.

The product of its digits is 93312, while the sum is 41.

The square root of 13983638 is about 3739.4702833423. The cubic root of 13983638 is about 240.9202975595.

The spelling of 13983638 in words is "thirteen million, nine hundred eighty-three thousand, six hundred thirty-eight".