23405136 has 20 divisors (see below), whose sum is σ = 60463392. Its totient is φ = 7801696.

The previous prime is 23405119. The next prime is 23405143. The reversal of 23405136 is 63150432.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243756 + ... + 243851.

Almost surely, 2^23405136 is an apocalyptic number.

It is an amenable number.

23405136 is an abundant number, since it is smaller than the sum of its proper divisors (37058256).

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

23405136 is a wasteful number, since it uses less digits than its factorization.

23405136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487618 (or 487612 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 23405136 is about 4837.8854885167. The cubic root of 23405136 is about 286.0467754032.

Adding to 23405136 its reverse (63150432), we get a palindrome (86555568).

The spelling of 23405136 in words is "twenty-three million, four hundred five thousand, one hundred thirty-six".