23990443 has 4 divisors (see below), whose sum is σ = 24020280. Its totient is φ = 23960608.

The previous prime is 23990419. The next prime is 23990459. The reversal of 23990443 is 34409932.

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

It is a cyclic number.

It is not a de Polignac number, because 23990443 - 2⁵ = 23990411 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23990399 and 23990408.

It is not an unprimeable number, because it can be changed into a prime (23990413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13678 + ... + 15331.

It is an arithmetic number, because the mean of its divisors is an integer number (6005070).

Almost surely, 2^23990443 is an apocalyptic number.

23990443 is a deficient number, since it is larger than the sum of its proper divisors (29837).

23990443 is an equidigital number, since it uses as much as digits as its factorization.

23990443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29836.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 23990443 is about 4898.0039812152. The cubic root of 23990443 is about 288.4116212584.

The spelling of 23990443 in words is "twenty-three million, nine hundred ninety thousand, four hundred forty-three".