23509904 has 60 divisors (see below), whose sum is σ = 51715440. Its totient is φ = 10267200.

The previous prime is 23509901. The next prime is 23509919. The reversal of 23509904 is 40990532.

It is not an unprimeable number, because it can be changed into a prime (23509901) 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 in 11 ways as a sum of consecutive naturals, for example, 169067 + ... + 169205.

It is an arithmetic number, because the mean of its divisors is an integer number (861924).

Almost surely, 2^23509904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23509904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25857720).

23509904 is an abundant number, since it is smaller than the sum of its proper divisors (28205536).

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

23509904 is a wasteful number, since it uses less digits than its factorization.

23509904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 23509904 is about 4848.7012694123. The cubic root of 23509904 is about 286.4729488656.

The spelling of 23509904 in words is "twenty-three million, five hundred nine thousand, nine hundred four".