23867138 has 4 divisors (see below), whose sum is σ = 35800710. Its totient is φ = 11933568.

The previous prime is 23867089. The next prime is 23867143. The reversal of 23867138 is 83176832.

It is a happy number.

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., 15264649 + 8602489 = 3907^2 + 2933^2 .

It is a super-2 number, since 2×23867138² = 1139280552622088, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5966783 + ... + 5966786.

Almost surely, 2^23867138 is an apocalyptic number.

23867138 is a deficient number, since it is larger than the sum of its proper divisors (11933572).

23867138 is a wasteful number, since it uses less digits than its factorization.

23867138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11933571.

The product of its digits is 48384, while the sum is 38.

The square root of 23867138 is about 4885.4004953535. The cubic root of 23867138 is about 287.9166505846.

It can be divided in two parts, 238 and 67138, that added together give a palindrome (67376).

The spelling of 23867138 in words is "twenty-three million, eight hundred sixty-seven thousand, one hundred thirty-eight".