23604538 has 4 divisors (see below), whose sum is σ = 35406810. Its totient is φ = 11802268.

The previous prime is 23604533. The next prime is 23604541. The reversal of 23604538 is 83540632.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 23164969 + 439569 = 4813^2 + 663^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (23604533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5901133 + ... + 5901136.

Almost surely, 2^23604538 is an apocalyptic number.

23604538 is a deficient number, since it is larger than the sum of its proper divisors (11802272).

23604538 is a wasteful number, since it uses less digits than its factorization.

23604538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11802271.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 23604538 is about 4858.4501644043. The cubic root of 23604538 is about 286.8568124340.

It can be divided in two parts, 23604 and 538, that added together give a palindrome (24142).

The spelling of 23604538 in words is "twenty-three million, six hundred four thousand, five hundred thirty-eight".