13839405 has 8 divisors (see below), whose sum is σ = 22143072. Its totient is φ = 7381008.

The previous prime is 13839383. The next prime is 13839407. The reversal of 13839405 is 50493831.

13839405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13839405 - 2⁵ = 13839373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13839407) 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, 461299 + ... + 461328.

It is an arithmetic number, because the mean of its divisors is an integer number (2767884).

Almost surely, 2^13839405 is an apocalyptic number.

13839405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13839405 is a deficient number, since it is larger than the sum of its proper divisors (8303667).

13839405 is an equidigital number, since it uses as much as digits as its factorization.

13839405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922635.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 13839405 is about 3720.1350781927. The cubic root of 13839405 is about 240.0891162110.

The spelling of 13839405 in words is "thirteen million, eight hundred thirty-nine thousand, four hundred five".