23866138 has 4 divisors (see below), whose sum is σ = 35799210. Its totient is φ = 11933068.

The previous prime is 23866127. The next prime is 23866163. The reversal of 23866138 is 83166832.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16265089 + 7601049 = 4033^2 + 2757^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23866097 and 23866106.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5966533 + ... + 5966536.

Almost surely, 2^23866138 is an apocalyptic number.

23866138 is a deficient number, since it is larger than the sum of its proper divisors (11933072).

23866138 is a wasteful number, since it uses less digits than its factorization.

23866138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11933071.

The product of its digits is 41472, while the sum is 37.

The square root of 23866138 is about 4885.2981485269. The cubic root of 23866138 is about 287.9126294256.

The spelling of 23866138 in words is "twenty-three million, eight hundred sixty-six thousand, one hundred thirty-eight".