23645240 has 16 divisors (see below), whose sum is σ = 53201880. Its totient is φ = 9458080.

The previous prime is 23645239. The next prime is 23645263. The reversal of 23645240 is 4254632.

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 3 ways as a sum of consecutive naturals, for example, 295526 + ... + 295605.

Almost surely, 2^23645240 is an apocalyptic number.

23645240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23645240 is an abundant number, since it is smaller than the sum of its proper divisors (29556640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23645240 is a wasteful number, since it uses less digits than its factorization.

23645240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591142 (or 591138 counting only the distinct ones).

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

The square root of 23645240 is about 4862.6371445955. The cubic root of 23645240 is about 287.0215963061.

Adding to 23645240 its reverse (4254632), we get a palindrome (27899872).

The spelling of 23645240 in words is "twenty-three million, six hundred forty-five thousand, two hundred forty".