13985638 has 8 divisors (see below), whose sum is σ = 21214440. Its totient is φ = 6914160.

The previous prime is 13985617. The next prime is 13985639. The reversal of 13985638 is 83658931.

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

It is a junction number, because it is equal to n+sod(n) for n = 13985594 and 13985603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13985639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39108 + ... + 39463.

It is an arithmetic number, because the mean of its divisors is an integer number (2651805).

Almost surely, 2^13985638 is an apocalyptic number.

13985638 is a deficient number, since it is larger than the sum of its proper divisors (7228802).

13985638 is an equidigital number, since it uses as much as digits as its factorization.

13985638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78662.

The product of its digits is 155520, while the sum is 43.

The square root of 13985638 is about 3739.7376913361. The cubic root of 13985638 is about 240.9317828307.

The spelling of 13985638 in words is "thirteen million, nine hundred eighty-five thousand, six hundred thirty-eight".