23198566 has 4 divisors (see below), whose sum is σ = 34797852. Its totient is φ = 11599282.

The previous prime is 23198551. The next prime is 23198599. The reversal of 23198566 is 66589132.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5799640 + ... + 5799643.

It is an arithmetic number, because the mean of its divisors is an integer number (8699463).

Almost surely, 2^23198566 is an apocalyptic number.

23198566 is a deficient number, since it is larger than the sum of its proper divisors (11599286).

23198566 is a wasteful number, since it uses less digits than its factorization.

23198566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11599285.

The product of its digits is 77760, while the sum is 40.

The square root of 23198566 is about 4816.4889701940. The cubic root of 23198566 is about 285.2027530262.

The spelling of 23198566 in words is "twenty-three million, one hundred ninety-eight thousand, five hundred sixty-six".