23440403 has 8 divisors (see below), whose sum is σ = 26903040. Its totient is φ = 20006280.

The previous prime is 23440393. The next prime is 23440411. The reversal of 23440403 is 30404432.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23440403 - 2¹² = 23436307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23440423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5333 + ... + 8678.

It is an arithmetic number, because the mean of its divisors is an integer number (3362880).

Almost surely, 2^23440403 is an apocalyptic number.

23440403 is a deficient number, since it is larger than the sum of its proper divisors (3462637).

23440403 is a wasteful number, since it uses less digits than its factorization.

23440403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14257.

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 23440403 is about 4841.5289940266. The cubic root of 23440403 is about 286.1903756366.

Adding to 23440403 its reverse (30404432), we get a palindrome (53844835).

The spelling of 23440403 in words is "twenty-three million, four hundred forty thousand, four hundred three".