23640285 has 16 divisors (see below), whose sum is σ = 40049856. Its totient is φ = 11866368.

The previous prime is 23640257. The next prime is 23640293. The reversal of 23640285 is 58204632.

It is not a de Polignac number, because 23640285 - 2²¹ = 21543133 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46099 + ... + 46608.

It is an arithmetic number, because the mean of its divisors is an integer number (2503116).

Almost surely, 2^23640285 is an apocalyptic number.

It is an amenable number.

23640285 is a deficient number, since it is larger than the sum of its proper divisors (16409571).

23640285 is a wasteful number, since it uses less digits than its factorization.

23640285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92732.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 23640285 is about 4862.1276207027. The cubic root of 23640285 is about 287.0015458807.

The spelling of 23640285 in words is "twenty-three million, six hundred forty thousand, two hundred eighty-five".