23640325 has 12 divisors (see below), whose sum is σ = 29997088. Its totient is φ = 18471600.

The previous prime is 23640311. The next prime is 23640341. The reversal of 23640325 is 52304632.

It is a happy number.

It is not a de Polignac number, because 23640325 - 2⁵ = 23640293 is a prime.

It is a super-2 number, since 2×23640325² = 1117729932211250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23640325.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 9921 + ... + 12070.

Almost surely, 2^23640325 is an apocalyptic number.

23640325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23640325 is a deficient number, since it is larger than the sum of its proper divisors (6356763).

23640325 is a wasteful number, since it uses less digits than its factorization.

23640325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22044 (or 22039 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 23640325 is about 4862.1317341265. The cubic root of 23640325 is about 287.0017077521.

Adding to 23640325 its reverse (52304632), we get a palindrome (75944957).

The spelling of 23640325 in words is "twenty-three million, six hundred forty thousand, three hundred twenty-five".