9004538 has 4 divisors (see below), whose sum is σ = 13506810. Its totient is φ = 4502268.

The previous prime is 9004531. The next prime is 9004561. The reversal of 9004538 is 8354009.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8354009 = 1289 ⋅6481.

It can be written as a sum of positive squares in only one way, i.e., 8922169 + 82369 = 2987^2 + 287^2 .

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 9004538.

It is not an unprimeable number, because it can be changed into a prime (9004531) 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 as a sum of consecutive naturals, namely, 2251133 + ... + 2251136.

Almost surely, 2^9004538 is an apocalyptic number.

9004538 is a deficient number, since it is larger than the sum of its proper divisors (4502272).

9004538 is a wasteful number, since it uses less digits than its factorization.

9004538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4502271.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 9004538 is about 3000.7562380173. The cubic root of 9004538 is about 208.0433372471.

The spelling of 9004538 in words is "nine million, four thousand, five hundred thirty-eight".