28068491972 has 12 divisors (see below), whose sum is σ = 49852993680. Its totient is φ = 13824779496.

The previous prime is 28068491963. The next prime is 28068491977. The reversal of 28068491972 is 27919486082.

It is not an unprimeable number, because it can be changed into a prime (28068491977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52366322 + ... + 52366857.

It is an arithmetic number, because the mean of its divisors is an integer number (4154416140).

Almost surely, 2^28068491972 is an apocalyptic number.

It is an amenable number.

28068491972 is a deficient number, since it is larger than the sum of its proper divisors (21784501708).

28068491972 is a wasteful number, since it uses less digits than its factorization.

28068491972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104733250 (or 104733248 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 56.

The spelling of 28068491972 in words is "twenty-eight billion, sixty-eight million, four hundred ninety-one thousand, nine hundred seventy-two".