13004439 has 32 divisors (see below), whose sum is σ = 21312000. Its totient is φ = 6884352.

The previous prime is 13004393. The next prime is 13004449. The reversal of 13004439 is 93440031.

It is not a de Polignac number, because 13004439 - 2⁷ = 13004311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13004449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25812 + ... + 26310.

It is an arithmetic number, because the mean of its divisors is an integer number (666000).

Almost surely, 2^13004439 is an apocalyptic number.

13004439 is a deficient number, since it is larger than the sum of its proper divisors (8307561).

13004439 is a wasteful number, since it uses less digits than its factorization.

13004439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 13004439 is about 3606.1668014666. The cubic root of 13004439 is about 235.1602287385.

The spelling of 13004439 in words is "thirteen million, four thousand, four hundred thirty-nine".