23216644 has 24 divisors (see below), whose sum is σ = 45755136. Its totient is φ = 10212000.

The previous prime is 23216621. The next prime is 23216663. The reversal of 23216644 is 44661232.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7147 + ... + 9874.

It is an arithmetic number, because the mean of its divisors is an integer number (1906464).

Almost surely, 2^23216644 is an apocalyptic number.

It is an amenable number.

23216644 is a deficient number, since it is larger than the sum of its proper divisors (22538492).

23216644 is a wasteful number, since it uses less digits than its factorization.

23216644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17067 (or 17065 counting only the distinct ones).

The product of its digits is 6912, while the sum is 28.

The square root of 23216644 is about 4818.3652829565. The cubic root of 23216644 is about 285.2768173263.

Adding to 23216644 its reverse (44661232), we get a palindrome (67877876).

The spelling of 23216644 in words is "twenty-three million, two hundred sixteen thousand, six hundred forty-four".