23890638 has 16 divisors (see below), whose sum is σ = 50296320. Its totient is φ = 7544376.

The previous prime is 23890631. The next prime is 23890649. The reversal of 23890638 is 83609832.

It is a junction number, because it is equal to n+sod(n) for n = 23890596 and 23890605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23890631) 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 7 ways as a sum of consecutive naturals, for example, 104670 + ... + 104897.

It is an arithmetic number, because the mean of its divisors is an integer number (3143520).

Almost surely, 2^23890638 is an apocalyptic number.

23890638 is an abundant number, since it is smaller than the sum of its proper divisors (26405682).

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

23890638 is a wasteful number, since it uses less digits than its factorization.

23890638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209591.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 23890638 is about 4887.8050288447. The cubic root of 23890638 is about 288.0111155046.

The spelling of 23890638 in words is "twenty-three million, eight hundred ninety thousand, six hundred thirty-eight".