28566720000 has 1200 divisors, whose sum is σ = 127961914080. Its totient is φ = 5971968000.

The previous prime is 28566719983. The next prime is 28566720023. The reversal of 28566720000 is 2766582.

28566720000 is a `hidden beast` number, since 28 + 566 + 72 + 0 + 0 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1200).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 262079946 + ... + 262080054.

Almost surely, 2^28566720000 is an apocalyptic number.

28566720000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28566720000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63980957040).

28566720000 is an abundant number, since it is smaller than the sum of its proper divisors (99395194080).

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

28566720000 is a wasteful number, since it uses less digits than its factorization.

28566720000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 28566720000 in words is "twenty-eight billion, five hundred sixty-six million, seven hundred twenty thousand".