23643138 has 8 divisors (see below), whose sum is σ = 47286288. Its totient is φ = 7881044.

The previous prime is 23643133. The next prime is 23643143. The reversal of 23643138 is 83134632.

It is an interprime number because it is at equal distance from previous prime (23643133) and next prime (23643143).

It is a sphenic number, since it is the product of 3 distinct primes.

23643138 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (23643133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1970256 + ... + 1970267.

It is an arithmetic number, because the mean of its divisors is an integer number (5910786).

Almost surely, 2^23643138 is an apocalyptic number.

23643138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

23643138 is a wasteful number, since it uses less digits than its factorization.

23643138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3940528.

The product of its digits is 10368, while the sum is 30.

The square root of 23643138 is about 4862.4210019290. The cubic root of 23643138 is about 287.0130908977.

The spelling of 23643138 in words is "twenty-three million, six hundred forty-three thousand, one hundred thirty-eight".