28605785650 has 24 divisors (see below), whose sum is σ = 57299590404. Its totient is φ = 10562136000.

The previous prime is 28605785623. The next prime is 28605785693. The reversal of 28605785650 is 5658750682.

It can be written as a sum of positive squares in 6 ways, for example, as 133610481 + 28472175169 = 11559^2 + 168737^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22003801 + ... + 22005100.

Almost surely, 2^28605785650 is an apocalyptic number.

28605785650 is an abundant number, since it is smaller than the sum of its proper divisors (28693804754).

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

28605785650 is a wasteful number, since it uses less digits than its factorization.

28605785650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44008926 (or 44008921 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 52.

The spelling of 28605785650 in words is "twenty-eight billion, six hundred five million, seven hundred eighty-five thousand, six hundred fifty".