23161938 has 16 divisors (see below), whose sum is σ = 46380576. Its totient is φ = 7711200.

The previous prime is 23161937. The next prime is 23161961. The reversal of 23161938 is 83916132.

It is a junction number, because it is equal to n+sod(n) for n = 23161899 and 23161908.

It is not an unprimeable number, because it can be changed into a prime (23161937) 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 7 ways as a sum of consecutive naturals, for example, 4470 + ... + 8142.

It is an arithmetic number, because the mean of its divisors is an integer number (2898786).

Almost surely, 2^23161938 is an apocalyptic number.

23161938 is an abundant number, since it is smaller than the sum of its proper divisors (23218638).

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

23161938 is a wasteful number, since it uses less digits than its factorization.

23161938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4729.

The product of its digits is 7776, while the sum is 33.

The square root of 23161938 is about 4812.6851133229. The cubic root of 23161938 is about 285.0525726346.

The spelling of 23161938 in words is "twenty-three million, one hundred sixty-one thousand, nine hundred thirty-eight".