44172644 has 24 divisors (see below), whose sum is σ = 84000000. Its totient is φ = 20247840.

The previous prime is 44172641. The next prime is 44172677. The reversal of 44172644 is 44627144.

It is a self number, because there is not a number n which added to its sum of digits gives 44172644.

It is not an unprimeable number, because it can be changed into a prime (44172641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7019 + ... + 11730.

It is an arithmetic number, because the mean of its divisors is an integer number (3500000).

Almost surely, 2^44172644 is an apocalyptic number.

It is an amenable number.

44172644 is a deficient number, since it is larger than the sum of its proper divisors (39827356).

44172644 is a wasteful number, since it uses less digits than its factorization.

44172644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18803 (or 18801 counting only the distinct ones).

The product of its digits is 21504, while the sum is 32.

The square root of 44172644 is about 6646.2503714501. The cubic root of 44172644 is about 353.4959684032.

Adding to 44172644 its reverse (44627144), we get a palindrome (88799788).

The spelling of 44172644 in words is "forty-four million, one hundred seventy-two thousand, six hundred forty-four".