23405406 has 16 divisors (see below), whose sum is σ = 47452944. Its totient is φ = 7694784.

The previous prime is 23405401. The next prime is 23405429. The reversal of 23405406 is 60450432.

23405406 = T₇₆₄ + T₇₆₅ + ... + T₈₃₆.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23405401) 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, 26281 + ... + 27156.

It is an arithmetic number, because the mean of its divisors is an integer number (2965809).

Almost surely, 2^23405406 is an apocalyptic number.

23405406 is an abundant number, since it is smaller than the sum of its proper divisors (24047538).

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

23405406 is a wasteful number, since it uses less digits than its factorization.

23405406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53515.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 23405406 is about 4837.9133931893. The cubic root of 23405406 is about 286.0478753375.

Adding to 23405406 its reverse (60450432), we get a palindrome (83855838).

The spelling of 23405406 in words is "twenty-three million, four hundred five thousand, four hundred six".