23238889 has 4 divisors (see below), whose sum is σ = 24040260. Its totient is φ = 22437520.

The previous prime is 23238869. The next prime is 23238913. The reversal of 23238889 is 98883232.

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 9659664 + 13579225 = 3108^2 + 3685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23238889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23238869) 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, 400642 + ... + 400699.

It is an arithmetic number, because the mean of its divisors is an integer number (6010065).

Almost surely, 2^23238889 is an apocalyptic number.

23238889 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

23238889 is a deficient number, since it is larger than the sum of its proper divisors (801371).

23238889 is an equidigital number, since it uses as much as digits as its factorization.

23238889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801370.

The product of its digits is 165888, while the sum is 43.

The square root of 23238889 is about 4820.6730857838. The cubic root of 23238889 is about 285.3679007904.

The spelling of 23238889 in words is "twenty-three million, two hundred thirty-eight thousand, eight hundred eighty-nine".