28338548580 has 72 divisors (see below), whose sum is σ = 85975481592. Its totient is φ = 7555608576.

The previous prime is 28338548543. The next prime is 28338548591. The reversal of 28338548580 is 8584583382.

28338548580 is a `hidden beast` number, since 2 + 8 + 3 + 3 + 8 + 54 + 8 + 580 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1405800036 + 26932748544 = 37494^2 + 164112^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1407142 + ... + 1427138.

It is an arithmetic number, because the mean of its divisors is an integer number (1194103911).

Almost surely, 2^28338548580 is an apocalyptic number.

28338548580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28338548580 is an abundant number, since it is smaller than the sum of its proper divisors (57636933012).

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

28338548580 is a wasteful number, since it uses less digits than its factorization.

28338548580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27885 (or 27880 counting only the distinct ones).

The product of its (nonzero) digits is 7372800, while the sum is 54.

The spelling of 28338548580 in words is "twenty-eight billion, three hundred thirty-eight million, five hundred forty-eight thousand, five hundred eighty".