13864839 has 8 divisors (see below), whose sum is σ = 18531072. Its totient is φ = 9220920.

The previous prime is 13864831. The next prime is 13864849. The reversal of 13864839 is 93846831.

It is a happy number.

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

It is not a de Polignac number, because 13864839 - 2³ = 13864831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13864839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13864831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4069 + ... + 6654.

It is an arithmetic number, because the mean of its divisors is an integer number (2316384).

Almost surely, 2^13864839 is an apocalyptic number.

13864839 is a deficient number, since it is larger than the sum of its proper divisors (4666233).

13864839 is a wasteful number, since it uses less digits than its factorization.

13864839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11157.

The product of its digits is 124416, while the sum is 42.

The square root of 13864839 is about 3723.5519333024. The cubic root of 13864839 is about 240.2361044572.

The spelling of 13864839 in words is "thirteen million, eight hundred sixty-four thousand, eight hundred thirty-nine".