23218889 has 8 divisors (see below), whose sum is σ = 24634368. Its totient is φ = 21808960.

The previous prime is 23218883. The next prime is 23218913. The reversal of 23218889 is 98881232.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23218889 - 2⁴ = 23218873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23218883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9944 + ... + 12054.

It is an arithmetic number, because the mean of its divisors is an integer number (3079296).

Almost surely, 2^23218889 is an apocalyptic number.

It is an amenable number.

23218889 is a deficient number, since it is larger than the sum of its proper divisors (1415479).

23218889 is a wasteful number, since it uses less digits than its factorization.

23218889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2775.

The product of its digits is 55296, while the sum is 41.

The square root of 23218889 is about 4818.5982401524. The cubic root of 23218889 is about 285.2860122501.

The spelling of 23218889 in words is "twenty-three million, two hundred eighteen thousand, eight hundred eighty-nine".