28529355636 has 144 divisors (see below), whose sum is σ = 75877401600. Its totient is φ = 9026035200.

The previous prime is 28529355619. The next prime is 28529355661. The reversal of 28529355636 is 63655392582.

28529355636 is a `hidden beast` number, since 2 + 8 + 52 + 9 + 3 + 556 + 36 = 666.

It is a congruent number.

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, 23175141 + ... + 23176371.

It is an arithmetic number, because the mean of its divisors is an integer number (526926400).

Almost surely, 2^28529355636 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 28529355636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37938700800).

28529355636 is an abundant number, since it is smaller than the sum of its proper divisors (47348045964).

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

28529355636 is a wasteful number, since it uses less digits than its factorization.

28529355636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630 (or 1625 counting only the distinct ones).

The product of its digits is 11664000, while the sum is 54.

The spelling of 28529355636 in words is "twenty-eight billion, five hundred twenty-nine million, three hundred fifty-five thousand, six hundred thirty-six".