23671638 has 24 divisors (see below), whose sum is σ = 52676208. Its totient is φ = 7677072.

The previous prime is 23671621. The next prime is 23671649. The reversal of 23671638 is 83617632.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17106 + ... + 18437.

It is an arithmetic number, because the mean of its divisors is an integer number (2194842).

Almost surely, 2^23671638 is an apocalyptic number.

23671638 is an abundant number, since it is smaller than the sum of its proper divisors (29004570).

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

23671638 is a wasteful number, since it uses less digits than its factorization.

23671638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35588 (or 35585 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 23671638 is about 4865.3507581674. The cubic root of 23671638 is about 287.1283687223.

It can be divided in two parts, 2367 and 1638, that added together give a triangular number (4005 = T₈₉).

The spelling of 23671638 in words is "twenty-three million, six hundred seventy-one thousand, six hundred thirty-eight".