23040538 has 4 divisors (see below), whose sum is σ = 34560810. Its totient is φ = 11520268.

The previous prime is 23040497. The next prime is 23040541. The reversal of 23040538 is 83504032.

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., 19210689 + 3829849 = 4383^2 + 1957^2 .

It is an unprimeable number.

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, 5760133 + ... + 5760136.

Almost surely, 2^23040538 is an apocalyptic number.

23040538 is a deficient number, since it is larger than the sum of its proper divisors (11520272).

23040538 is a wasteful number, since it uses less digits than its factorization.

23040538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11520271.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 23040538 is about 4800.0560413395. The cubic root of 23040538 is about 284.5536791667.

The spelling of 23040538 in words is "twenty-three million, forty thousand, five hundred thirty-eight".