23640467238 has 12 divisors (see below), whose sum is σ = 51221012388. Its totient is φ = 7880155740.

The previous prime is 23640467159. The next prime is 23640467243. The reversal of 23640467238 is 83276404632.

23640467238 is a `hidden beast` number, since 2 + 3 + 6 + 404 + 6 + 7 + 238 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 23640467193 and 23640467202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 656679628 + ... + 656679663.

It is an arithmetic number, because the mean of its divisors is an integer number (4268417699).

Almost surely, 2^23640467238 is an apocalyptic number.

23640467238 is an abundant number, since it is smaller than the sum of its proper divisors (27580545150).

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

23640467238 is a wasteful number, since it uses less digits than its factorization.

23640467238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313359299 (or 1313359296 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 45.

The spelling of 23640467238 in words is "twenty-three billion, six hundred forty million, four hundred sixty-seven thousand, two hundred thirty-eight".