23640471 has 16 divisors (see below), whose sum is σ = 35101920. Its totient is φ = 15724800.

The previous prime is 23640451. The next prime is 23640479. The reversal of 23640471 is 17404632.

It is not a de Polignac number, because 23640471 - 2⁵ = 23640439 is a prime.

It is a super-3 number, since 3×23640471³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23640479) 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, 17521 + ... + 18821.

It is an arithmetic number, because the mean of its divisors is an integer number (2193870).

Almost surely, 2^23640471 is an apocalyptic number.

23640471 is a deficient number, since it is larger than the sum of its proper divisors (11461449).

23640471 is a wasteful number, since it uses less digits than its factorization.

23640471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1983 (or 1977 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 23640471 is about 4862.1467480939. The cubic root of 23640471 is about 287.0022985810.

The spelling of 23640471 in words is "twenty-three million, six hundred forty thousand, four hundred seventy-one".