28707720736716 has 288 divisors, whose sum is σ = 85960059494400. Its totient is φ = 7905099156480.

The previous prime is 28707720736687. The next prime is 28707720736759. The reversal of 28707720736716 is 61763702770782.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2268840646 + ... + 2268853298.

It is an arithmetic number, because the mean of its divisors is an integer number (298472428800).

Almost surely, 2^{28707720736716} 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 28707720736716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42980029747200).

28707720736716 is an abundant number, since it is smaller than the sum of its proper divisors (57252338757684).

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

28707720736716 is a wasteful number, since it uses less digits than its factorization.

28707720736716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13869 (or 13864 counting only the distinct ones).

The product of its (nonzero) digits is 58084992, while the sum is 63.

The spelling of 28707720736716 in words is "twenty-eight trillion, seven hundred seven billion, seven hundred twenty million, seven hundred thirty-six thousand, seven hundred sixteen".