28862728866 has 96 divisors (see below), whose sum is σ = 66095265600. Its totient is φ = 9437700096.

The previous prime is 28862728837. The next prime is 28862728883. The reversal of 28862728866 is 66882726882.

28862728866 is a `hidden beast` number, since 288 + 6 + 272 + 8 + 86 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8366710 + ... + 8370158.

It is an arithmetic number, because the mean of its divisors is an integer number (688492350).

Almost surely, 2^28862728866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28862728866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33047632800).

28862728866 is an abundant number, since it is smaller than the sum of its proper divisors (37232536734).

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

28862728866 is a wasteful number, since it uses less digits than its factorization.

28862728866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3790 (or 3778 counting only the distinct ones).

The product of its digits is 49545216, while the sum is 63.

The spelling of 28862728866 in words is "twenty-eight billion, eight hundred sixty-two million, seven hundred twenty-eight thousand, eight hundred sixty-six".