28001691417684 has 96 divisors (see below), whose sum is σ = 66149628120576. Its totient is φ = 9218789314560.

The previous prime is 28001691417673. The next prime is 28001691417779. The reversal of 28001691417684 is 48671419610082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 177379492 + ... + 177537284.

It is an arithmetic number, because the mean of its divisors is an integer number (689058626256).

Almost surely, 2^{28001691417684} is an apocalyptic number.

It is an amenable number.

28001691417684 is an abundant number, since it is smaller than the sum of its proper divisors (38147936702892).

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

28001691417684 is a wasteful number, since it uses less digits than its factorization.

28001691417684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158545 (or 158543 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 57.

The spelling of 28001691417684 in words is "twenty-eight trillion, one billion, six hundred ninety-one million, four hundred seventeen thousand, six hundred eighty-four".