13840839 has 24 divisors (see below), whose sum is σ = 21529872. Its totient is φ = 8536320.

The previous prime is 13840829. The next prime is 13840843. The reversal of 13840839 is 93804831.

It is not a de Polignac number, because 13840839 - 2⁵ = 13840807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13840829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8592 + ... + 10074.

It is an arithmetic number, because the mean of its divisors is an integer number (897078).

Almost surely, 2^13840839 is an apocalyptic number.

13840839 is a deficient number, since it is larger than the sum of its proper divisors (7689033).

13840839 is a wasteful number, since it uses less digits than its factorization.

13840839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1567 (or 1564 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 13840839 is about 3720.3278081373. The cubic root of 13840839 is about 240.0974083764.

The spelling of 13840839 in words is "thirteen million, eight hundred forty thousand, eight hundred thirty-nine".