28086444500 has 24 divisors (see below), whose sum is σ = 61340795880. Its totient is φ = 11234577600.

The previous prime is 28086444497. The next prime is 28086444517. The reversal of 28086444500 is 544468082.

It can be written as a sum of positive squares in 4 ways, for example, as 3721732036 + 24364712464 = 61006^2 + 156092^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28085945 + ... + 28086944.

It is an arithmetic number, because the mean of its divisors is an integer number (2555866495).

Almost surely, 2^28086444500 is an apocalyptic number.

28086444500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28086444500 is an abundant number, since it is smaller than the sum of its proper divisors (33254351380).

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

28086444500 is a wasteful number, since it uses less digits than its factorization.

28086444500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56172908 (or 56172896 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 41.

The spelling of 28086444500 in words is "twenty-eight billion, eighty-six million, four hundred forty-four thousand, five hundred".