13888239 has 8 divisors (see below), whose sum is σ = 18778752. Its totient is φ = 9128280.

The previous prime is 13888181. The next prime is 13888249. The reversal of 13888239 is 93288831.

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

It is not a de Polignac number, because 13888239 - 2⁷ = 13888111 is a prime.

It is a super-2 number, since 2×13888239² = 385766365042242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13888239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13888249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32389 + ... + 32814.

It is an arithmetic number, because the mean of its divisors is an integer number (2347344).

Almost surely, 2^13888239 is an apocalyptic number.

13888239 is a deficient number, since it is larger than the sum of its proper divisors (4890513).

13888239 is an equidigital number, since it uses as much as digits as its factorization.

13888239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65277.

The product of its digits is 82944, while the sum is 42.

The square root of 13888239 is about 3726.6927697357. The cubic root of 13888239 is about 240.3711791182.

The spelling of 13888239 in words is "thirteen million, eight hundred eighty-eight thousand, two hundred thirty-nine".