23923809 has 72 divisors (see below), whose sum is σ = 45061920. Its totient is φ = 12501216.

The previous prime is 23923759. The next prime is 23923819. The reversal of 23923809 is 90832932.

It is not a de Polignac number, because 23923809 - 2⁸ = 23923553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23923819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 223534 + ... + 223640.

It is an arithmetic number, because the mean of its divisors is an integer number (625860).

Almost surely, 2^23923809 is an apocalyptic number.

It is an amenable number.

23923809 is a deficient number, since it is larger than the sum of its proper divisors (21138111).

23923809 is a wasteful number, since it uses less digits than its factorization.

23923809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 23923809 is about 4891.1970927371. The cubic root of 23923809 is about 288.1443503802.

The spelling of 23923809 in words is "twenty-three million, nine hundred twenty-three thousand, eight hundred nine".