23998566 has 16 divisors (see below), whose sum is σ = 48178800. Its totient is φ = 7969248.

The previous prime is 23998561. The next prime is 23998567. The reversal of 23998566 is 66589932.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23998561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5821 + ... + 9048.

It is an arithmetic number, because the mean of its divisors is an integer number (3011175).

Almost surely, 2^23998566 is an apocalyptic number.

23998566 is an abundant number, since it is smaller than the sum of its proper divisors (24180234).

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

23998566 is a wasteful number, since it uses less digits than its factorization.

23998566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15143.

The product of its digits is 699840, while the sum is 48.

The square root of 23998566 is about 4898.8331263680. The cubic root of 23998566 is about 288.4441689863. Note that the first 3 decimals are identical.

The spelling of 23998566 in words is "twenty-three million, nine hundred ninety-eight thousand, five hundred sixty-six".