28285612864 has 28 divisors (see below), whose sum is σ = 56329047108. Its totient is φ = 14092467200.

The previous prime is 28285612837. The next prime is 28285612889. The reversal of 28285612864 is 46821658282.

It can be written as a sum of positive squares in 2 ways, for example, as 9064563264 + 19221049600 = 95208^2 + 138640^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 768427 + ... + 804394.

Almost surely, 2^28285612864 is an apocalyptic number.

It is an amenable number.

28285612864 is a deficient number, since it is larger than the sum of its proper divisors (28043434244).

28285612864 is a wasteful number, since it uses less digits than its factorization.

28285612864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573114 (or 1573104 counting only the distinct ones).

The product of its digits is 2949120, while the sum is 52.

The spelling of 28285612864 in words is "twenty-eight billion, two hundred eighty-five million, six hundred twelve thousand, eight hundred sixty-four".