28444756 has 12 divisors (see below), whose sum is σ = 50338260. Its totient is φ = 14062400.

The previous prime is 28444753. The next prime is 28444769. The reversal of 28444756 is 65744482.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7376656 + 21068100 = 2716^2 + 4590^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28444751) 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, 39595 + ... + 40306.

It is an arithmetic number, because the mean of its divisors is an integer number (4194855).

Almost surely, 2^28444756 is an apocalyptic number.

It is an amenable number.

28444756 is a deficient number, since it is larger than the sum of its proper divisors (21893504).

28444756 is a wasteful number, since it uses less digits than its factorization.

28444756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79994 (or 79992 counting only the distinct ones).

The product of its digits is 215040, while the sum is 40.

The square root of 28444756 is about 5333.3625415867. The cubic root of 28444756 is about 305.2582458500.

The spelling of 28444756 in words is "twenty-eight million, four hundred forty-four thousand, seven hundred fifty-six".