23538438 has 192 divisors, whose sum is σ = 71705088. Its totient is φ = 5598720.

The previous prime is 23538433. The next prime is 23538443. The reversal of 23538438 is 83483532.

It is an interprime number because it is at equal distance from previous prime (23538433) and next prime (23538443).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23538433) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 636156 + ... + 636192.

It is an arithmetic number, because the mean of its divisors is an integer number (373464).

Almost surely, 2^23538438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23538438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35852544).

23538438 is an abundant number, since it is smaller than the sum of its proper divisors (48166650).

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

23538438 is a wasteful number, since it uses less digits than its factorization.

23538438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89 (or 77 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 23538438 is about 4851.6428145526. The cubic root of 23538438 is about 286.5887995348.

The spelling of 23538438 in words is "twenty-three million, five hundred thirty-eight thousand, four hundred thirty-eight".