23638842 has 24 divisors (see below), whose sum is σ = 52059540. Its totient is φ = 7750080.

The previous prime is 23638807. The next prime is 23638843. The reversal of 23638842 is 24883632.

23638842 is a `hidden beast` number, since 236 + 388 + 42 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18481401 + 5157441 = 4299^2 + 2271^2 .

It is a super-2 number, since 2×23638842² = 1117589702201928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23638797 and 23638806.

It is not an unprimeable number, because it can be changed into a prime (23638843) by changing a digit.

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, 9667 + ... + 11862.

Almost surely, 2^23638842 is an apocalyptic number.

23638842 is an abundant number, since it is smaller than the sum of its proper divisors (28420698).

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

23638842 is a wasteful number, since it uses less digits than its factorization.

23638842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21598 (or 21595 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 23638842 is about 4861.9792266113. The cubic root of 23638842 is about 286.9957062492.

The spelling of 23638842 in words is "twenty-three million, six hundred thirty-eight thousand, eight hundred forty-two".