23240305 has 8 divisors (see below), whose sum is σ = 30423744. Its totient is φ = 16902000.

The previous prime is 23240291. The next prime is 23240381. The reversal of 23240305 is 50304232.

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

It is not a de Polignac number, because 23240305 - 2¹⁵ = 23207537 is a prime.

It is a super-2 number, since 2×23240305² = 1080223552986050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211221 + ... + 211330.

It is an arithmetic number, because the mean of its divisors is an integer number (3802968).

Almost surely, 2^23240305 is an apocalyptic number.

It is an amenable number.

23240305 is a deficient number, since it is larger than the sum of its proper divisors (7183439).

23240305 is a wasteful number, since it uses less digits than its factorization.

23240305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422567.

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 23240305 is about 4820.8199510042. The cubic root of 23240305 is about 285.3736967178.

Adding to 23240305 its reverse (50304232), we get a palindrome (73544537).

The spelling of 23240305 in words is "twenty-three million, two hundred forty thousand, three hundred five".