23120656 has 40 divisors (see below), whose sum is σ = 49918680. Its totient is φ = 10300416.

The previous prime is 23120651. The next prime is 23120683. The reversal of 23120656 is 65602132.

It can be written as a sum of positive squares in 4 ways, for example, as 80656 + 23040000 = 284^2 + 4800^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 23120656.

It is not an unprimeable number, because it can be changed into a prime (23120651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4116 + ... + 7948.

It is an arithmetic number, because the mean of its divisors is an integer number (1247967).

Almost surely, 2^23120656 is an apocalyptic number.

23120656 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23120656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24959340).

23120656 is an abundant number, since it is smaller than the sum of its proper divisors (26798024).

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

23120656 is a wasteful number, since it uses less digits than its factorization.

23120656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3883 (or 3877 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 23120656 is about 4808.3943265918. The cubic root of 23120656 is about 284.8831202279.

Adding to 23120656 its reverse (65602132), we get a palindrome (88722788).

The spelling of 23120656 in words is "twenty-three million, one hundred twenty thousand, six hundred fifty-six".