23405678 has 4 divisors (see below), whose sum is σ = 35108520. Its totient is φ = 11702838.

The previous prime is 23405677. The next prime is 23405687. The reversal of 23405678 is 87650432.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23405677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5851418 + ... + 5851421.

It is an arithmetic number, because the mean of its divisors is an integer number (8777130).

Almost surely, 2^23405678 is an apocalyptic number.

23405678 is a deficient number, since it is larger than the sum of its proper divisors (11702842).

23405678 is a wasteful number, since it uses less digits than its factorization.

23405678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11702841.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 23405678 is about 4837.9415044004. The cubic root of 23405678 is about 286.0489834108.

The spelling of 23405678 in words is "twenty-three million, four hundred five thousand, six hundred seventy-eight".