23209164 has 144 divisors (see below), whose sum is σ = 69189120. Its totient is φ = 6491520.

The previous prime is 23209141. The next prime is 23209169. The reversal of 23209164 is 46190232.

It is not an unprimeable number, because it can be changed into a prime (23209169) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 493789 + ... + 493835.

It is an arithmetic number, because the mean of its divisors is an integer number (480480).

Almost surely, 2^23209164 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23209164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34594560).

23209164 is an abundant number, since it is smaller than the sum of its proper divisors (45979956).

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

23209164 is a wasteful number, since it uses less digits than its factorization.

23209164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 23209164 is about 4817.5890235677. The cubic root of 23209164 is about 285.2461769547.

Adding to 23209164 its reverse (46190232), we get a palindrome (69399396).

The spelling of 23209164 in words is "twenty-three million, two hundred nine thousand, one hundred sixty-four".