23640297 has 16 divisors (see below), whose sum is σ = 33454080. Its totient is φ = 14816912.

The previous prime is 23640293. The next prime is 23640311. The reversal of 23640297 is 79204632.

It is a cyclic number.

It is not a de Polignac number, because 23640297 - 2² = 23640293 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23640293) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1168 + ... + 6974.

It is an arithmetic number, because the mean of its divisors is an integer number (2090880).

Almost surely, 2^23640297 is an apocalyptic number.

It is an amenable number.

23640297 is a deficient number, since it is larger than the sum of its proper divisors (9813783).

23640297 is a wasteful number, since it uses less digits than its factorization.

23640297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5892.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 23640297 is about 4862.1288547302. The cubic root of 23640297 is about 287.0015944421.

The spelling of 23640297 in words is "twenty-three million, six hundred forty thousand, two hundred ninety-seven".