23440424 has 24 divisors (see below), whose sum is σ = 51127290. Its totient is φ = 10045728.

The previous prime is 23440423. The next prime is 23440441. The reversal of 23440424 is 42404432.

It can be written as a sum of positive squares in only one way, i.e., 18232900 + 5207524 = 4270^2 + 2282^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 23440424.

It is not an unprimeable number, because it can be changed into a prime (23440421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29507 + ... + 30290.

Almost surely, 2^23440424 is an apocalyptic number.

It is an amenable number.

23440424 is an abundant number, since it is smaller than the sum of its proper divisors (27686866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23440424 is a wasteful number, since it uses less digits than its factorization.

23440424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59817 (or 59806 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 23440424 is about 4841.5311627625. The cubic root of 23440424 is about 286.1904611015.

Adding to 23440424 its reverse (42404432), we get a palindrome (65844856).

The spelling of 23440424 in words is "twenty-three million, four hundred forty thousand, four hundred twenty-four".