13916638 has 4 divisors (see below), whose sum is σ = 20874960. Its totient is φ = 6958318.

The previous prime is 13916629. The next prime is 13916641. The reversal of 13916638 is 83661931.

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 = 13916597 and 13916606.

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, 3479158 + ... + 3479161.

It is an arithmetic number, because the mean of its divisors is an integer number (5218740).

Almost surely, 2^13916638 is an apocalyptic number.

13916638 is a deficient number, since it is larger than the sum of its proper divisors (6958322).

13916638 is an equidigital number, since it uses as much as digits as its factorization.

13916638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6958321.

The product of its digits is 23328, while the sum is 37.

The square root of 13916638 is about 3730.5010387346. The cubic root of 13916638 is about 240.5349064641.

The spelling of 13916638 in words is "thirteen million, nine hundred sixteen thousand, six hundred thirty-eight".