23904745 has 4 divisors (see below), whose sum is σ = 28685700. Its totient is φ = 19123792.

The previous prime is 23904739. The next prime is 23904773. The reversal of 23904745 is 54740932.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18386944 + 5517801 = 4288^2 + 2349^2 .

It is a cyclic number.

It is not a de Polignac number, because 23904745 - 2¹³ = 23896553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23904745.

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 in 3 ways as a sum of consecutive naturals, for example, 2390470 + ... + 2390479.

It is an arithmetic number, because the mean of its divisors is an integer number (7171425).

Almost surely, 2^23904745 is an apocalyptic number.

It is an amenable number.

23904745 is a deficient number, since it is larger than the sum of its proper divisors (4780955).

23904745 is an equidigital number, since it uses as much as digits as its factorization.

23904745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4780954.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 23904745 is about 4889.2478971719. The cubic root of 23904745 is about 288.0677928436.

It can be divided in two parts, 23904 and 745, that added together give a square (24649 = 157²).

The spelling of 23904745 in words is "twenty-three million, nine hundred four thousand, seven hundred forty-five".