28550551328 has 24 divisors (see below), whose sum is σ = 60532660188. Its totient is φ = 13177177344.

The previous prime is 28550551319. The next prime is 28550551331. The reversal of 28550551328 is 82315505582.

It can be written as a sum of positive squares in 2 ways, for example, as 28287203344 + 263347984 = 168188^2 + 16228^2 .

It is a super-2 number, since 2×28550551328² (a number of 22 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 34315151 + ... + 34315982.

Almost surely, 2^28550551328 is an apocalyptic number.

It is an amenable number.

28550551328 is an abundant number, since it is smaller than the sum of its proper divisors (31982108860).

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

28550551328 is a wasteful number, since it uses less digits than its factorization.

28550551328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68631156 (or 68631148 counting only the distinct ones).

The product of its (nonzero) digits is 480000, while the sum is 44.

The spelling of 28550551328 in words is "twenty-eight billion, five hundred fifty million, five hundred fifty-one thousand, three hundred twenty-eight".