28055530000 has 100 divisors (see below), whose sum is σ = 68222433708. Its totient is φ = 11173120000.

The previous prime is 28055529991. The next prime is 28055530003. The reversal of 28055530000 is 3555082.

It can be written as a sum of positive squares in 10 ways, for example, as 23583130624 + 4472399376 = 153568^2 + 66876^2 .

It is a tau number, because it is divible by the number of its divisors (100).

It is a super-2 number, since 2×28055530000² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28055530003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2323980 + ... + 2336020.

Almost surely, 2^28055530000 is an apocalyptic number.

28055530000 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 28055530000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34111216854).

28055530000 is an abundant number, since it is smaller than the sum of its proper divisors (40166903708).

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

28055530000 is a wasteful number, since it uses less digits than its factorization.

28055530000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12302 (or 12281 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The spelling of 28055530000 in words is "twenty-eight billion, fifty-five million, five hundred thirty thousand".