13888839 has 4 divisors (see below), whose sum is σ = 18518456. Its totient is φ = 9259224.

The previous prime is 13888817. The next prime is 13888841. The reversal of 13888839 is 93888831.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-13888839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13888879) 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, 2314804 + ... + 2314809.

It is an arithmetic number, because the mean of its divisors is an integer number (4629614).

Almost surely, 2^13888839 is an apocalyptic number.

13888839 is a deficient number, since it is larger than the sum of its proper divisors (4629617).

13888839 is an equidigital number, since it uses as much as digits as its factorization.

13888839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4629616.

The product of its digits is 331776, while the sum is 48.

The square root of 13888839 is about 3726.7732691968. The cubic root of 13888839 is about 240.3746405753.

The spelling of 13888839 in words is "thirteen million, eight hundred eighty-eight thousand, eight hundred thirty-nine".