28585743975680 has 54 divisors (see below), whose sum is σ = 68472248055918. Its totient is φ = 11434221076480.

The previous prime is 28585743975673. The next prime is 28585743975743. The reversal of 28585743975680 is 8657934758582.

It can be written as a sum of positive squares in 3 ways, for example, as 12932136592384 + 15653607383296 = 3596128^2 + 3956464^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 191209760 + ... + 191359200.

Almost surely, 2^{28585743975680} is an apocalyptic number.

28585743975680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28585743975680 is an abundant number, since it is smaller than the sum of its proper divisors (39886504080238).

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

28585743975680 is an frugal number, since it uses more digits than its factorization.

28585743975680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298903 (or 149448 counting only the distinct ones).

The product of its (nonzero) digits is 4064256000, while the sum is 77.

The spelling of 28585743975680 in words is "twenty-eight trillion, five hundred eighty-five billion, seven hundred forty-three million, nine hundred seventy-five thousand, six hundred eighty".