23998445 has 4 divisors (see below), whose sum is σ = 28798140. Its totient is φ = 19198752.

The previous prime is 23998439. The next prime is 23998477. The reversal of 23998445 is 54489932.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14182756 + 9815689 = 3766^2 + 3133^2 .

It is a cyclic number.

It is not a de Polignac number, because 23998445 - 2⁸ = 23998189 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23998396 and 23998405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2399840 + ... + 2399849.

It is an arithmetic number, because the mean of its divisors is an integer number (7199535).

Almost surely, 2^23998445 is an apocalyptic number.

It is an amenable number.

23998445 is a deficient number, since it is larger than the sum of its proper divisors (4799695).

23998445 is an equidigital number, since it uses as much as digits as its factorization.

23998445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4799694.

The product of its digits is 311040, while the sum is 44.

The square root of 23998445 is about 4898.8207764726. The cubic root of 23998445 is about 288.4436842100.

The spelling of 23998445 in words is "twenty-three million, nine hundred ninety-eight thousand, four hundred forty-five".