23440123 has 16 divisors (see below), whose sum is σ = 27934720. Its totient is φ = 19245600.

The previous prime is 23440099. The next prime is 23440133. The reversal of 23440123 is 32104432.

It is a cyclic number.

It is not a de Polignac number, because 23440123 - 2¹³ = 23431931 is a prime.

It is the 4842-nd Hogben number.

It is a self number, because there is not a number n which added to its sum of digits gives 23440123.

It is not an unprimeable number, because it can be changed into a prime (23440133) by changing a digit.

It is a nontrivial repunit in base 4841.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23158 + ... + 24148.

It is an arithmetic number, because the mean of its divisors is an integer number (1745920).

Almost surely, 2^23440123 is an apocalyptic number.

23440123 is a deficient number, since it is larger than the sum of its proper divisors (4494597).

23440123 is a wasteful number, since it uses less digits than its factorization.

23440123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 23440123 is about 4841.5000774553. The cubic root of 23440123 is about 286.1892360995.

Adding to 23440123 its reverse (32104432), we get a palindrome (55544555).

The spelling of 23440123 in words is "twenty-three million, four hundred forty thousand, one hundred twenty-three".