23986638 has 64 divisors (see below), whose sum is σ = 58705920. Its totient is φ = 7213536.

The previous prime is 23986637. The next prime is 23986639. The reversal of 23986638 is 83668932.

23986638 is a `hidden beast` number, since 2 + 3 + 9 + 8 + 6 + 638 = 666.

It is an interprime number because it is at equal distance from previous prime (23986637) and next prime (23986639).

It is a junction number, because it is equal to n+sod(n) for n = 23986593 and 23986602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23986637) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32631 + ... + 33357.

It is an arithmetic number, because the mean of its divisors is an integer number (917280).

Almost surely, 2^23986638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23986638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29352960).

23986638 is an abundant number, since it is smaller than the sum of its proper divisors (34719282).

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

23986638 is a wasteful number, since it uses less digits than its factorization.

23986638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798 (or 792 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 23986638 is about 4897.6155422818. The cubic root of 23986638 is about 288.3963726273.

The spelling of 23986638 in words is "twenty-three million, nine hundred eighty-six thousand, six hundred thirty-eight".