23440505 has 16 divisors (see below), whose sum is σ = 30780864. Its totient is φ = 16994880.

The previous prime is 23440489. The next prime is 23440511. The reversal of 23440505 is 50504432.

It is not a de Polignac number, because 23440505 - 2⁴ = 23440489 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30587 + ... + 31343.

It is an arithmetic number, because the mean of its divisors is an integer number (1923804).

Almost surely, 2^23440505 is an apocalyptic number.

It is an amenable number.

23440505 is a deficient number, since it is larger than the sum of its proper divisors (7340359).

23440505 is a wasteful number, since it uses less digits than its factorization.

23440505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 23440505 is about 4841.5395278775. The cubic root of 23440505 is about 286.1907907514.

Adding to 23440505 its reverse (50504432), we get a palindrome (73944937).

The spelling of 23440505 in words is "twenty-three million, four hundred forty thousand, five hundred five".