28665730180 has 36 divisors (see below), whose sum is σ = 60788604492. Its totient is φ = 11354884800.

The previous prime is 28665730129. The next prime is 28665730189. The reversal of 28665730180 is 8103756682.

It can be written as a sum of positive squares in 2 ways, for example, as 3896006724 + 24769723456 = 62418^2 + 157384^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28665730180.

It is not an unprimeable number, because it can be changed into a prime (28665730189) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 144630 + ... + 279730.

It is an arithmetic number, because the mean of its divisors is an integer number (1688572347).

Almost surely, 2^28665730180 is an apocalyptic number.

28665730180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28665730180 is an abundant number, since it is smaller than the sum of its proper divisors (32122874312).

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

28665730180 is a wasteful number, since it uses less digits than its factorization.

28665730180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135316 (or 135211 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 28665730180 in words is "twenty-eight billion, six hundred sixty-five million, seven hundred thirty thousand, one hundred eighty".