28345582180 has 24 divisors (see below), whose sum is σ = 60052503672. Its totient is φ = 11237893632.

The previous prime is 28345582169. The next prime is 28345582211. The reversal of 28345582180 is 8128554382.

It can be written as a sum of positive squares in 4 ways, for example, as 151142436 + 28194439744 = 12294^2 + 167912^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28345582180.

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, 6268887 + ... + 6273406.

It is an arithmetic number, because the mean of its divisors is an integer number (2502187653).

Almost surely, 2^28345582180 is an apocalyptic number.

28345582180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28345582180 is an abundant number, since it is smaller than the sum of its proper divisors (31706921492).

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

28345582180 is a wasteful number, since it uses less digits than its factorization.

28345582180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12542415 (or 12542413 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 46.

The spelling of 28345582180 in words is "twenty-eight billion, three hundred forty-five million, five hundred eighty-two thousand, one hundred eighty".