28099279728 has 240 divisors, whose sum is σ = 88409056736. Its totient is φ = 8588436480.

The previous prime is 28099279679. The next prime is 28099279751. The reversal of 28099279728 is 82797299082.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7933638 + ... + 7937178.

Almost surely, 2^28099279728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28099279728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44204528368).

28099279728 is an abundant number, since it is smaller than the sum of its proper divisors (60309777008).

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

28099279728 is a wasteful number, since it uses less digits than its factorization.

28099279728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3734 (or 3716 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 63.

The spelling of 28099279728 in words is "twenty-eight billion, ninety-nine million, two hundred seventy-nine thousand, seven hundred twenty-eight".