28055000500 has 24 divisors (see below), whose sum is σ = 61272122184. Its totient is φ = 11222000000.

The previous prime is 28055000483. The next prime is 28055000507. The reversal of 28055000500 is 500055082.

It can be written as a sum of positive squares in 4 ways, for example, as 391327524 + 27663672976 = 19782^2 + 166324^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28055000507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28054501 + ... + 28055500.

It is an arithmetic number, because the mean of its divisors is an integer number (2553005091).

Almost surely, 2^28055000500 is an apocalyptic number.

28055000500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28055000500 is an abundant number, since it is smaller than the sum of its proper divisors (33217121684).

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

28055000500 is a wasteful number, since it uses less digits than its factorization.

28055000500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56110020 (or 56110008 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

Adding to 28055000500 its reverse (500055082), we get a palindrome (28555055582).

The spelling of 28055000500 in words is "twenty-eight billion, fifty-five million, five hundred", and thus it is an aban number.