23189838 has 24 divisors (see below), whose sum is σ = 53952552. Its totient is φ = 6625584.

The previous prime is 23189833. The next prime is 23189843. The reversal of 23189838 is 83898132.

It is an interprime number because it is at equal distance from previous prime (23189833) and next prime (23189843).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 23189838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23189833) 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, 39145 + ... + 39732.

It is an arithmetic number, because the mean of its divisors is an integer number (2248023).

Almost surely, 2^23189838 is an apocalyptic number.

23189838 is an abundant number, since it is smaller than the sum of its proper divisors (30762714).

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

23189838 is a wasteful number, since it uses less digits than its factorization.

23189838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78896 (or 78889 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 23189838 is about 4815.5828307693. The cubic root of 23189838 is about 285.1669812480.

The spelling of 23189838 in words is "twenty-three million, one hundred eighty-nine thousand, eight hundred thirty-eight".