23198805 has 80 divisors (see below), whose sum is σ = 48787200. Its totient is φ = 10541664.

The previous prime is 23198803. The next prime is 23198821. The reversal of 23198805 is 50889132.

It is not a de Polignac number, because 23198805 - 2¹ = 23198803 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23198805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23198803) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 138832 + ... + 138998.

It is an arithmetic number, because the mean of its divisors is an integer number (609840).

Almost surely, 2^23198805 is an apocalyptic number.

It is an amenable number.

23198805 is an abundant number, since it is smaller than the sum of its proper divisors (25588395).

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

23198805 is an equidigital number, since it uses as much as digits as its factorization.

23198805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 23198805 is about 4816.5137807339. The cubic root of 23198805 is about 285.2037324434.

The spelling of 23198805 in words is "twenty-three million, one hundred ninety-eight thousand, eight hundred five".