28535281312 has 24 divisors (see below), whose sum is σ = 56381664276. Its totient is φ = 14216128512.

The previous prime is 28535281297. The next prime is 28535281321. The reversal of 28535281312 is 21318253582.

It can be written as a sum of positive squares in 2 ways, for example, as 28373381136 + 161900176 = 168444^2 + 12724^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1600753 + ... + 1618480.

Almost surely, 2^28535281312 is an apocalyptic number.

It is an amenable number.

28535281312 is a deficient number, since it is larger than the sum of its proper divisors (27846382964).

28535281312 is a wasteful number, since it uses less digits than its factorization.

28535281312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3219520 (or 3219512 counting only the distinct ones).

The product of its digits is 115200, while the sum is 40.

The spelling of 28535281312 in words is "twenty-eight billion, five hundred thirty-five million, two hundred eighty-one thousand, three hundred twelve".