28481728786 has 16 divisors (see below), whose sum is σ = 48835503936. Its totient is φ = 12204034416.

The previous prime is 28481728771. The next prime is 28481728799. The reversal of 28481728786 is 68782718482.

It is a super-2 number, since 2×28481728786² (a number of 22 digits) contains 22 as substring.

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, 127681 + ... + 270676.

It is an arithmetic number, because the mean of its divisors is an integer number (3052218996).

Almost surely, 2^28481728786 is an apocalyptic number.

28481728786 is a deficient number, since it is larger than the sum of its proper divisors (20353775150).

28481728786 is a wasteful number, since it uses less digits than its factorization.

28481728786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403473.

The product of its digits is 19267584, while the sum is 61.

The spelling of 28481728786 in words is "twenty-eight billion, four hundred eighty-one million, seven hundred twenty-eight thousand, seven hundred eighty-six".