23040556 has 48 divisors (see below), whose sum is σ = 50641920. Its totient is φ = 8910720.

The previous prime is 23040553. The next prime is 23040557. The reversal of 23040556 is 65504032.

It is a self number, because there is not a number n which added to its sum of digits gives 23040556.

It is not an unprimeable number, because it can be changed into a prime (23040553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73456 + ... + 73768.

It is an arithmetic number, because the mean of its divisors is an integer number (1055040).

Almost surely, 2^23040556 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 23040556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25320960).

23040556 is an abundant number, since it is smaller than the sum of its proper divisors (27601364).

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

23040556 is a wasteful number, since it uses less digits than its factorization.

23040556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574 (or 572 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 23040556 is about 4800.0579163173. The cubic root of 23040556 is about 284.5537532675.

Adding to 23040556 its reverse (65504032), we get a palindrome (88544588).

The spelling of 23040556 in words is "twenty-three million, forty thousand, five hundred fifty-six".