28788847500 has 720 divisors, whose sum is σ = 106645862400. Its totient is φ = 6032880000.

The previous prime is 28788847499. The next prime is 28788847513. The reversal of 28788847500 is 574888782.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 928672485 + ... + 928672515.

Almost surely, 2^28788847500 is an apocalyptic number.

28788847500 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 28788847500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53322931200).

28788847500 is an abundant number, since it is smaller than the sum of its proper divisors (77857014900).

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

28788847500 is a wasteful number, since it uses less digits than its factorization.

28788847500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 8028160, while the sum is 57.

The spelling of 28788847500 in words is "twenty-eight billion, seven hundred eighty-eight million, eight hundred forty-seven thousand, five hundred".