23915538 has 48 divisors (see below), whose sum is σ = 55014336. Its totient is φ = 7492320.

The previous prime is 23915533. The next prime is 23915597. The reversal of 23915538 is 83551932.

It is not an unprimeable number, because it can be changed into a prime (23915533) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24781 + ... + 25727.

It is an arithmetic number, because the mean of its divisors is an integer number (1146132).

Almost surely, 2^23915538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23915538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27507168).

23915538 is an abundant number, since it is smaller than the sum of its proper divisors (31098798).

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

23915538 is a wasteful number, since it uses less digits than its factorization.

23915538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039 (or 1036 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 23915538 is about 4890.3515211077. The cubic root of 23915538 is about 288.1111405539. Note that the first 4 decimals are identical.

The spelling of 23915538 in words is "twenty-three million, nine hundred fifteen thousand, five hundred thirty-eight".