28520571608 has 8 divisors (see below), whose sum is σ = 53476071780. Its totient is φ = 14260285800.

The previous prime is 28520571571. The next prime is 28520571613. The reversal of 28520571608 is 80617502582.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1782535718 + ... + 1782535733.

Almost surely, 2^28520571608 is an apocalyptic number.

It is an amenable number.

28520571608 is a deficient number, since it is larger than the sum of its proper divisors (24955500172).

28520571608 is a wasteful number, since it uses less digits than its factorization.

28520571608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3565071457 (or 3565071453 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 44.

The spelling of 28520571608 in words is "twenty-eight billion, five hundred twenty million, five hundred seventy-one thousand, six hundred eight".