23640723 has 12 divisors (see below), whose sum is σ = 34981128. Its totient is φ = 15375840.

The previous prime is 23640691. The next prime is 23640737. The reversal of 23640723 is 32704632.

23640723 is a `hidden beast` number, since 236 + 407 + 23 = 666.

It is not a de Polignac number, because 23640723 - 2⁵ = 23640691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23645723) 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, 31665 + ... + 32402.

It is an arithmetic number, because the mean of its divisors is an integer number (2915094).

Almost surely, 2^23640723 is an apocalyptic number.

23640723 is a deficient number, since it is larger than the sum of its proper divisors (11340405).

23640723 is a wasteful number, since it uses less digits than its factorization.

23640723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64114 (or 64111 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 27.

The square root of 23640723 is about 4862.1726625039. The cubic root of 23640723 is about 287.0033183622.

The spelling of 23640723 in words is "twenty-three million, six hundred forty thousand, seven hundred twenty-three".