23139606 has 64 divisors (see below), whose sum is σ = 56401920. Its totient is φ = 6181920.

The previous prime is 23139563. The next prime is 23139607. The reversal of 23139606 is 60693132.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23139607) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85251 + ... + 85521.

It is an arithmetic number, because the mean of its divisors is an integer number (881280).

Almost surely, 2^23139606 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23139606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28200960).

23139606 is an abundant number, since it is smaller than the sum of its proper divisors (33262314).

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

23139606 is a wasteful number, since it uses less digits than its factorization.

23139606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409.

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 23139606 is about 4810.3644352585. The cubic root of 23139606 is about 284.9609303168.

The spelling of 23139606 in words is "twenty-three million, one hundred thirty-nine thousand, six hundred six".