23305656 has 64 divisors (see below), whose sum is σ = 65070720. Its totient is φ = 6894720.

The previous prime is 23305651. The next prime is 23305663. The reversal of 23305656 is 65650332.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23305651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10326 + ... + 12378.

It is an arithmetic number, because the mean of its divisors is an integer number (1016730).

Almost surely, 2^23305656 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 23305656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32535360).

23305656 is an abundant number, since it is smaller than the sum of its proper divisors (41765064).

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

23305656 is a wasteful number, since it uses less digits than its factorization.

23305656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2116 (or 2112 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 30.

The square root of 23305656 is about 4827.5931891575. The cubic root of 23305656 is about 285.6409336460.

Adding to 23305656 its reverse (65650332), we get a palindrome (88955988).

The spelling of 23305656 in words is "twenty-three million, three hundred five thousand, six hundred fifty-six".