28575552000 has 320 divisors, whose sum is σ = 98091721728. Its totient is φ = 7372800000.

The previous prime is 28575551947. The next prime is 28575552013. The reversal of 28575552000 is 25557582.

It is a tau number, because it is divible by the number of its divisors (320).

It is a self number, because there is not a number n which added to its sum of digits gives 28575552000.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5949600 + ... + 5954400.

Almost surely, 2^28575552000 is an apocalyptic number.

28575552000 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 28575552000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49045860864).

28575552000 is an abundant number, since it is smaller than the sum of its proper divisors (69516169728).

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

28575552000 is an equidigital number, since it uses as much as digits as its factorization.

28575552000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4868 (or 4842 counting only the distinct ones).

The product of its (nonzero) digits is 140000, while the sum is 39.

The spelling of 28575552000 in words is "twenty-eight billion, five hundred seventy-five million, five hundred fifty-two thousand".