28713861660 has 96 divisors (see below), whose sum is σ = 88576395264. Its totient is φ = 6892000000.

The previous prime is 28713861653. The next prime is 28713861689. The reversal of 28713861660 is 6616831782.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148716 + ... + 282035.

It is an arithmetic number, because the mean of its divisors is an integer number (922670784).

Almost surely, 2^28713861660 is an apocalyptic number.

28713861660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28713861660 is an abundant number, since it is smaller than the sum of its proper divisors (59862533604).

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

28713861660 is a wasteful number, since it uses less digits than its factorization.

28713861660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430875 (or 430873 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 48.

The spelling of 28713861660 in words is "twenty-eight billion, seven hundred thirteen million, eight hundred sixty-one thousand, six hundred sixty".