23939838 has 48 divisors (see below), whose sum is σ = 56216160. Its totient is φ = 7319232.

The previous prime is 23939827. The next prime is 23939879. The reversal of 23939838 is 83893932.

It is a junction number, because it is equal to n+sod(n) for n = 23939793 and 23939802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61348 + ... + 61736.

It is an arithmetic number, because the mean of its divisors is an integer number (1171170).

Almost surely, 2^23939838 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23939838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28108080).

23939838 is an abundant number, since it is smaller than the sum of its proper divisors (32276322).

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

23939838 is a wasteful number, since it uses less digits than its factorization.

23939838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673 (or 670 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 23939838 is about 4892.8353742999. The cubic root of 23939838 is about 288.2086884443.

The spelling of 23939838 in words is "twenty-three million, nine hundred thirty-nine thousand, eight hundred thirty-eight".