28081207850168 has 64 divisors (see below), whose sum is σ = 57680856177120. Its totient is φ = 12710409523200.

The previous prime is 28081207850153. The next prime is 28081207850173. The reversal of 28081207850168 is 86105870218082.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 439334180 + ... + 439398092.

Almost surely, 2^{28081207850168} is an apocalyptic number.

It is an amenable number.

28081207850168 is an abundant number, since it is smaller than the sum of its proper divisors (29599648326952).

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

28081207850168 is a wasteful number, since it uses less digits than its factorization.

28081207850168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84888 (or 84884 counting only the distinct ones).

The product of its (nonzero) digits is 3440640, while the sum is 56.

The spelling of 28081207850168 in words is "twenty-eight trillion, eighty-one billion, two hundred seven million, eight hundred fifty thousand, one hundred sixty-eight".