23438989 has 32 divisors (see below), whose sum is σ = 29952000. Its totient is φ = 17889984.

The previous prime is 23438963. The next prime is 23439011. The reversal of 23438989 is 98983432.

It is not a de Polignac number, because 23438989 - 2¹⁵ = 23406221 is a prime.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23438929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 227512 + ... + 227614.

It is an arithmetic number, because the mean of its divisors is an integer number (936000).

Almost surely, 2^23438989 is an apocalyptic number.

23438989 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

23438989 is a deficient number, since it is larger than the sum of its proper divisors (6513011).

23438989 is a wasteful number, since it uses less digits than its factorization.

23438989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217.

The product of its digits is 373248, while the sum is 46.

The square root of 23438989 is about 4841.3829635756. The cubic root of 23438989 is about 286.1846208816.

The spelling of 23438989 in words is "twenty-three million, four hundred thirty-eight thousand, nine hundred eighty-nine".