44172728 has 8 divisors (see below), whose sum is σ = 82823880. Its totient is φ = 22086360.

The previous prime is 44172727. The next prime is 44172757. The reversal of 44172728 is 82727144.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44172727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2760788 + ... + 2760803.

It is an arithmetic number, because the mean of its divisors is an integer number (10352985).

Almost surely, 2^44172728 is an apocalyptic number.

It is an amenable number.

44172728 is a deficient number, since it is larger than the sum of its proper divisors (38651152).

44172728 is a wasteful number, since it uses less digits than its factorization.

44172728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5521597 (or 5521593 counting only the distinct ones).

The product of its digits is 25088, while the sum is 35.

The square root of 44172728 is about 6646.2566907997. The cubic root of 44172728 is about 353.4961924758.

The spelling of 44172728 in words is "forty-four million, one hundred seventy-two thousand, seven hundred twenty-eight".