28568377500 has 240 divisors, whose sum is σ = 90534044832. Its totient is φ = 6967296000.

The previous prime is 28568377499. The next prime is 28568377529. The reversal of 28568377500 is 577386582.

It is a congruent number.

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 79 ways as a sum of consecutive naturals, for example, 11016204 + ... + 11018796.

Almost surely, 2^28568377500 is an apocalyptic number.

28568377500 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 28568377500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45267022416).

28568377500 is an abundant number, since it is smaller than the sum of its proper divisors (61965667332).

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

28568377500 is a wasteful number, since it uses less digits than its factorization.

28568377500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2746 (or 2729 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 51.

The spelling of 28568377500 in words is "twenty-eight billion, five hundred sixty-eight million, three hundred seventy-seven thousand, five hundred".