28528361608 has 8 divisors (see below), whose sum is σ = 53490678030. Its totient is φ = 14264180800.

The previous prime is 28528361591. The next prime is 28528361639. The reversal of 28528361608 is 80616382582.

It can be written as a sum of positive squares in only one way, i.e., 22758136164 + 5770225444 = 150858^2 + 75962^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1783022593 + ... + 1783022608.

Almost surely, 2^28528361608 is an apocalyptic number.

It is an amenable number.

28528361608 is a deficient number, since it is larger than the sum of its proper divisors (24962316422).

28528361608 is a wasteful number, since it uses less digits than its factorization.

28528361608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3566045207 (or 3566045203 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 49.

The spelling of 28528361608 in words is "twenty-eight billion, five hundred twenty-eight million, three hundred sixty-one thousand, six hundred eight".