23806405 has 12 divisors (see below), whose sum is σ = 33232140. Its totient is φ = 16324224.

The previous prime is 23806399. The next prime is 23806417. The reversal of 23806405 is 50460832.

It can be written as a sum of positive squares in 2 ways, for example, as 8767521 + 15038884 = 2961^2 + 3878^2 .

It is not a de Polignac number, because 23806405 - 2³ = 23806397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48340 + ... + 48829.

It is an arithmetic number, because the mean of its divisors is an integer number (2769345).

Almost surely, 2^23806405 is an apocalyptic number.

It is an amenable number.

23806405 is a deficient number, since it is larger than the sum of its proper divisors (9425735).

23806405 is an equidigital number, since it uses as much as digits as its factorization.

23806405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97188 (or 97181 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 23806405 is about 4879.1807714001. The cubic root of 23806405 is about 287.6722295069.

The spelling of 23806405 in words is "twenty-three million, eight hundred six thousand, four hundred five".