13840929 has 16 divisors (see below), whose sum is σ = 20697600. Its totient is φ = 9140688.

The previous prime is 13840919. The next prime is 13840933. The reversal of 13840929 is 92904831.

It is not a de Polignac number, because 13840929 - 2⁴ = 13840913 is a prime.

It is a Curzon number.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 13840893 and 13840902.

It is not an unprimeable number, because it can be changed into a prime (13840909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 592 + ... + 5294.

It is an arithmetic number, because the mean of its divisors is an integer number (1293600).

Almost surely, 2^13840929 is an apocalyptic number.

It is an amenable number.

13840929 is a deficient number, since it is larger than the sum of its proper divisors (6856671).

13840929 is a wasteful number, since it uses less digits than its factorization.

13840929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4821 (or 4815 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 13840929 is about 3720.3399038260. The cubic root of 13840929 is about 240.0979287860.

The spelling of 13840929 in words is "thirteen million, eight hundred forty thousand, nine hundred twenty-nine".