23709138 has 16 divisors (see below), whose sum is σ = 47472480. Its totient is φ = 7894016.

The previous prime is 23709121. The next prime is 23709143. The reversal of 23709138 is 83190732.

It is a junction number, because it is equal to n+sod(n) for n = 23709099 and 23709108.

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 7 ways as a sum of consecutive naturals, for example, 5458 + ... + 8786.

It is an arithmetic number, because the mean of its divisors is an integer number (2967030).

Almost surely, 2^23709138 is an apocalyptic number.

23709138 is an abundant number, since it is smaller than the sum of its proper divisors (23763342).

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

23709138 is a wasteful number, since it uses less digits than its factorization.

23709138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4521.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 23709138 is about 4869.2030148680. The cubic root of 23709138 is about 287.2799091869.

The spelling of 23709138 in words is "twenty-three million, seven hundred nine thousand, one hundred thirty-eight".