28066909809108 has 24 divisors (see below), whose sum is σ = 65828779834048. Its totient is φ = 9307161801216.

The previous prime is 28066909809091. The next prime is 28066909809119. The reversal of 28066909809108 is 80190890966082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6059347816 + ... + 6059352447.

Almost surely, 2^{28066909809108} is an apocalyptic number.

It is an amenable number.

28066909809108 is an abundant number, since it is smaller than the sum of its proper divisors (37761870024940).

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

28066909809108 is a wasteful number, since it uses less digits than its factorization.

28066909809108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12118700463 (or 12118700461 counting only the distinct ones).

The product of its (nonzero) digits is 26873856, while the sum is 66.

The spelling of 28066909809108 in words is "twenty-eight trillion, sixty-six billion, nine hundred nine million, eight hundred nine thousand, one hundred eight".