28808027860 has 12 divisors (see below), whose sum is σ = 60496858548. Its totient is φ = 11523211136.

The previous prime is 28808027819. The next prime is 28808027879. The reversal of 28808027860 is 6872080882.

It can be written as a sum of positive squares in 2 ways, for example, as 22914087876 + 5893939984 = 151374^2 + 76772^2 .

It is a congruent number.

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, 720200677 + ... + 720200716.

It is an arithmetic number, because the mean of its divisors is an integer number (5041404879).

Almost surely, 2^28808027860 is an apocalyptic number.

28808027860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28808027860 is an abundant number, since it is smaller than the sum of its proper divisors (31688830688).

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

28808027860 is a wasteful number, since it uses less digits than its factorization.

28808027860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440401402 (or 1440401400 counting only the distinct ones).

The product of its (nonzero) digits is 688128, while the sum is 49.

The spelling of 28808027860 in words is "twenty-eight billion, eight hundred eight million, twenty-seven thousand, eight hundred sixty".