28712535500 has 96 divisors (see below), whose sum is σ = 68519400768. Its totient is φ = 10424064000.

The previous prime is 28712535497. The next prime is 28712535559. The reversal of 28712535500 is 553521782.

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, 3697622 + ... + 3705378.

It is an arithmetic number, because the mean of its divisors is an integer number (713743758).

Almost surely, 2^28712535500 is an apocalyptic number.

28712535500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28712535500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34259700384).

28712535500 is an abundant number, since it is smaller than the sum of its proper divisors (39806865268).

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

28712535500 is a wasteful number, since it uses less digits than its factorization.

28712535500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8460 (or 8448 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 38.

The spelling of 28712535500 in words is "twenty-eight billion, seven hundred twelve million, five hundred thirty-five thousand, five hundred".