28567611500 has 96 divisors (see below), whose sum is σ = 66753435840. Its totient is φ = 10647936000.

The previous prime is 28567611491. The next prime is 28567611517. The reversal of 28567611500 is 511676582.

It is a super-2 number, since 2×28567611500² (a number of 22 digits) contains 22 as substring.

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, 554852 + ... + 604148.

It is an arithmetic number, because the mean of its divisors is an integer number (695348290).

Almost surely, 2^28567611500 is an apocalyptic number.

28567611500 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 28567611500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33376717920).

28567611500 is an abundant number, since it is smaller than the sum of its proper divisors (38185824340).

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

28567611500 is a wasteful number, since it uses less digits than its factorization.

28567611500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49396 (or 49384 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 41.

The spelling of 28567611500 in words is "twenty-eight billion, five hundred sixty-seven million, six hundred eleven thousand, five hundred".