23415564 has 48 divisors (see below), whose sum is σ = 58367232. Its totient is φ = 7288512.

The previous prime is 23415563. The next prime is 23415583. The reversal of 23415564 is 46551432.

It is not an unprimeable number, because it can be changed into a prime (23415563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10882 + ... + 12854.

It is an arithmetic number, because the mean of its divisors is an integer number (1215984).

Almost surely, 2^23415564 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 23415564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29183616).

23415564 is an abundant number, since it is smaller than the sum of its proper divisors (34951668).

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

23415564 is a wasteful number, since it uses less digits than its factorization.

23415564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2046 (or 2044 counting only the distinct ones).

The product of its digits is 14400, while the sum is 30.

The square root of 23415564 is about 4838.9631120727. The cubic root of 23415564 is about 286.0892511641.

Adding to 23415564 its reverse (46551432), we get a palindrome (69966996).

The spelling of 23415564 in words is "twenty-three million, four hundred fifteen thousand, five hundred sixty-four".