23405838 has 16 divisors (see below), whose sum is σ = 49565520. Its totient is φ = 7342976.

The previous prime is 23405801. The next prime is 23405839. The reversal of 23405838 is 83850432.

It is a junction number, because it is equal to n+sod(n) for n = 23405799 and 23405808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23405839) 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, 114633 + ... + 114836.

It is an arithmetic number, because the mean of its divisors is an integer number (3097845).

Almost surely, 2^23405838 is an apocalyptic number.

23405838 is an abundant number, since it is smaller than the sum of its proper divisors (26159682).

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

23405838 is a wasteful number, since it uses less digits than its factorization.

23405838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229491.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 23405838 is about 4837.9580403307. The cubic root of 23405838 is about 286.0496352147.

The spelling of 23405838 in words is "twenty-three million, four hundred five thousand, eight hundred thirty-eight".