23240645 has 16 divisors (see below), whose sum is σ = 28978992. Its totient is φ = 17879040.

The previous prime is 23240641. The next prime is 23240663. The reversal of 23240645 is 54604232.

It can be written as a sum of positive squares in 8 ways, for example, as 6340324 + 16900321 = 2518^2 + 4111^2 .

It is not a de Polignac number, because 23240645 - 2² = 23240641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23240641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14189 + ... + 15741.

It is an arithmetic number, because the mean of its divisors is an integer number (1811187).

Almost surely, 2^23240645 is an apocalyptic number.

It is an amenable number.

23240645 is a deficient number, since it is larger than the sum of its proper divisors (5738347).

23240645 is a wasteful number, since it uses less digits than its factorization.

23240645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 23240645 is about 4820.8552145859. The cubic root of 23240645 is about 285.3750883603.

Adding to 23240645 its reverse (54604232), we get a palindrome (77844877).

The spelling of 23240645 in words is "twenty-three million, two hundred forty thousand, six hundred forty-five".