28081508588 has 36 divisors (see below), whose sum is σ = 59651412912. Its totient is φ = 11511672480.

The previous prime is 28081508579. The next prime is 28081508617. The reversal of 28081508588 is 88580518082.

It is a super-2 number, since 2×28081508588² (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 (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3110123 + ... + 3119138.

It is an arithmetic number, because the mean of its divisors is an integer number (1656983692).

Almost surely, 2^28081508588 is an apocalyptic number.

28081508588 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28081508588 is an abundant number, since it is smaller than the sum of its proper divisors (31569904324).

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

28081508588 is a wasteful number, since it uses less digits than its factorization.

28081508588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6229302 (or 6229293 counting only the distinct ones).

The product of its (nonzero) digits is 1638400, while the sum is 53.

The spelling of 28081508588 in words is "twenty-eight billion, eighty-one million, five hundred eight thousand, five hundred eighty-eight".