28522272800 has 162 divisors, whose sum is σ = 81093229623. Its totient is φ = 9767600640.

The previous prime is 28522272787. The next prime is 28522272839. The reversal of 28522272800 is 827222582.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 5 ways, for example, as 288864016 + 28233408784 = 16996^2 + 168028^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=119420.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 33437174 + ... + 33438026.

Almost surely, 2^28522272800 is an apocalyptic number.

28522272800 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 28522272800

28522272800 is an abundant number, since it is smaller than the sum of its proper divisors (52570956823).

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

28522272800 is an frugal number, since it uses more digits than its factorization.

28522272800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1740 (or 867 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 38.

The spelling of 28522272800 in words is "twenty-eight billion, five hundred twenty-two million, two hundred seventy-two thousand, eight hundred".