28657984992 has 192 divisors, whose sum is σ = 93489177600. Its totient is φ = 7484534784.

The previous prime is 28657984969. The next prime is 28657985011. The reversal of 28657984992 is 29948975682.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 883884 + ... + 915732.

It is an arithmetic number, because the mean of its divisors is an integer number (486922800).

Almost surely, 2^28657984992 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 28657984992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46744588800).

28657984992 is an abundant number, since it is smaller than the sum of its proper divisors (64831192608).

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

28657984992 is a wasteful number, since it uses less digits than its factorization.

28657984992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31985 (or 31977 counting only the distinct ones).

The product of its digits is 156764160, while the sum is 69.

The spelling of 28657984992 in words is "twenty-eight billion, six hundred fifty-seven million, nine hundred eighty-four thousand, nine hundred ninety-two".