23440234 has 4 divisors (see below), whose sum is σ = 35160354. Its totient is φ = 11720116.

The previous prime is 23440217. The next prime is 23440237. The reversal of 23440234 is 43204432.

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

It can be written as a sum of positive squares in only one way, i.e., 23011209 + 429025 = 4797^2 + 655^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (23440237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5860057 + ... + 5860060.

Almost surely, 2^23440234 is an apocalyptic number.

23440234 is a deficient number, since it is larger than the sum of its proper divisors (11720120).

23440234 is a wasteful number, since it uses less digits than its factorization.

23440234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11720119.

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 23440234 is about 4841.5115408310. The cubic root of 23440234 is about 286.1896878456.

Adding to 23440234 its reverse (43204432), we get a palindrome (66644666).

The spelling of 23440234 in words is "twenty-three million, four hundred forty thousand, two hundred thirty-four".