23172644 has 12 divisors (see below), whose sum is σ = 44238768. Its totient is φ = 10533000.

The previous prime is 23172641. The next prime is 23172659. The reversal of 23172644 is 44627132.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (23172641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263282 + ... + 263369.

It is an arithmetic number, because the mean of its divisors is an integer number (3686564).

Almost surely, 2^23172644 is an apocalyptic number.

It is an amenable number.

23172644 is a deficient number, since it is larger than the sum of its proper divisors (21066124).

23172644 is a wasteful number, since it uses less digits than its factorization.

23172644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526666 (or 526664 counting only the distinct ones).

The product of its digits is 8064, while the sum is 29.

The square root of 23172644 is about 4813.7972537281. The cubic root of 23172644 is about 285.0964852347.

Adding to 23172644 its reverse (44627132), we get a palindrome (67799776).

The spelling of 23172644 in words is "twenty-three million, one hundred seventy-two thousand, six hundred forty-four".