28505046912 has 64 divisors (see below), whose sum is σ = 75762282960. Its totient is φ = 9495941120.

The previous prime is 28505046863. The next prime is 28505046917. The reversal of 28505046912 is 21964050582.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28505046917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 639298 + ... + 682430.

Almost surely, 2^28505046912 is an apocalyptic number.

It is an amenable number.

28505046912 is an abundant number, since it is smaller than the sum of its proper divisors (47257236048).

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

28505046912 is a wasteful number, since it uses less digits than its factorization.

28505046912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44871 (or 44859 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The spelling of 28505046912 in words is "twenty-eight billion, five hundred five million, forty-six thousand, nine hundred twelve".