28017876680 has 16 divisors (see below), whose sum is σ = 63040222620. Its totient is φ = 11207150656.

The previous prime is 28017876659. The next prime is 28017876697. The reversal of 28017876680 is 8667871082.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27967210756 + 50665924 = 167234^2 + 7118^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350223419 + ... + 350223498.

Almost surely, 2^28017876680 is an apocalyptic number.

28017876680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28017876680 is an abundant number, since it is smaller than the sum of its proper divisors (35022345940).

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

28017876680 is a wasteful number, since it uses less digits than its factorization.

28017876680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700446928 (or 700446924 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 53.

The spelling of 28017876680 in words is "twenty-eight billion, seventeen million, eight hundred seventy-six thousand, six hundred eighty".