28522821600 has 1080 divisors, whose sum is σ = 130495819608. Its totient is φ = 6009292800.

The previous prime is 28522821563. The next prime is 28522821601. The reversal of 28522821600 is 612822582.

28522821600 is a `hidden beast` number, since 2 + 8 + 5 + 2 + 28 + 21 + 600 = 666.

It is a tau number, because it is divible by the number of its divisors (1080).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28522821601) by changing a digit.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 41277255 + ... + 41277945.

Almost surely, 2^28522821600 is an apocalyptic number.

28522821600 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 28522821600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65247909804).

28522821600 is an abundant number, since it is smaller than the sum of its proper divisors (101972998008).

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

28522821600 is a wasteful number, since it uses less digits than its factorization.

28522821600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750 (or 721 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The spelling of 28522821600 in words is "twenty-eight billion, five hundred twenty-two million, eight hundred twenty-one thousand, six hundred".