28069659786 has 32 divisors (see below), whose sum is σ = 67933296000. Its totient is φ = 7548143616.

The previous prime is 28069659773. The next prime is 28069659847. The reversal of 28069659786 is 68795696082.

It is a Curzon 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, 19655911 + ... + 19657338.

It is an arithmetic number, because the mean of its divisors is an integer number (2122915500).

Almost surely, 2^28069659786 is an apocalyptic number.

28069659786 is an abundant number, since it is smaller than the sum of its proper divisors (39863636214).

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

28069659786 is a wasteful number, since it uses less digits than its factorization.

28069659786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39313278.

The product of its (nonzero) digits is 78382080, while the sum is 66.

It can be divided in two parts, 2806965 and 9786, that added together give a triangular number (2816751 = T₂₃₇₃).

The spelling of 28069659786 in words is "twenty-eight billion, sixty-nine million, six hundred fifty-nine thousand, seven hundred eighty-six".