13004538 has 16 divisors (see below), whose sum is σ = 26712480. Its totient is φ = 4217616.

The previous prime is 13004527. The next prime is 13004539. The reversal of 13004538 is 83540031.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13004539) 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, 29068 + ... + 29511.

It is an arithmetic number, because the mean of its divisors is an integer number (1669530).

Almost surely, 2^13004538 is an apocalyptic number.

13004538 is an abundant number, since it is smaller than the sum of its proper divisors (13707942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13004538 is a wasteful number, since it uses less digits than its factorization.

13004538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58621.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 13004538 is about 3606.1805279270. The cubic root of 13004538 is about 235.1608254784.

Adding to 13004538 its reverse (83540031), we get a palindrome (96544569).

The spelling of 13004538 in words is "thirteen million, four thousand, five hundred thirty-eight".