28444440684 has 24 divisors (see below), whose sum is σ = 72404031168. Its totient is φ = 8619527440.

The previous prime is 28444440677. The next prime is 28444440709. The reversal of 28444440684 is 48604444482.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107743962 + ... + 107744225.

It is an arithmetic number, because the mean of its divisors is an integer number (3016834632).

Almost surely, 2^28444440684 is an apocalyptic number.

It is an amenable number.

28444440684 is an abundant number, since it is smaller than the sum of its proper divisors (43959590484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28444440684 is a wasteful number, since it uses less digits than its factorization.

28444440684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215488205 (or 215488203 counting only the distinct ones).

The product of its (nonzero) digits is 3145728, while the sum is 48.

The spelling of 28444440684 in words is "twenty-eight billion, four hundred forty-four million, four hundred forty thousand, six hundred eighty-four".