23997644 has 24 divisors (see below), whose sum is σ = 46569936. Its totient is φ = 10728000.

The previous prime is 23997643. The next prime is 23997667. The reversal of 23997644 is 44679932.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 23997595 and 23997604.

It is not an unprimeable number, because it can be changed into a prime (23997641) 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 7 ways as a sum of consecutive naturals, for example, 1787 + ... + 7154.

It is an arithmetic number, because the mean of its divisors is an integer number (1940414).

Almost surely, 2^23997644 is an apocalyptic number.

It is an amenable number.

23997644 is a deficient number, since it is larger than the sum of its proper divisors (22572292).

23997644 is a wasteful number, since it uses less digits than its factorization.

23997644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9017 (or 9015 counting only the distinct ones).

The product of its digits is 326592, while the sum is 44.

The square root of 23997644 is about 4898.7390214217. The cubic root of 23997644 is about 288.4404750304.

The spelling of 23997644 in words is "twenty-three million, nine hundred ninety-seven thousand, six hundred forty-four".