28791486828 has 384 divisors, whose sum is σ = 87325056000. Its totient is φ = 8129341440.

The previous prime is 28791486803. The next prime is 28791486859. The reversal of 28791486828 is 82868419782.

28791486828 is a `hidden beast` number, since 2 + 8 + 79 + 1 + 486 + 82 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 159068898 + ... + 159069078.

It is an arithmetic number, because the mean of its divisors is an integer number (227409000).

Almost surely, 2^28791486828 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28791486828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43662528000).

28791486828 is an abundant number, since it is smaller than the sum of its proper divisors (58533569172).

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

28791486828 is a wasteful number, since it uses less digits than its factorization.

28791486828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382 (or 374 counting only the distinct ones).

The product of its digits is 24772608, while the sum is 63.

The spelling of 28791486828 in words is "twenty-eight billion, seven hundred ninety-one million, four hundred eighty-six thousand, eight hundred twenty-eight".