28251030580728 has 128 divisors (see below), whose sum is σ = 71917148160000. Its totient is φ = 9245486904192.

The previous prime is 28251030580699. The next prime is 28251030580831. The reversal of 28251030580728 is 82708503015282.

It is a happy number.

It is a congruent number.

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, 6792743913 + ... + 6792748071.

It is an arithmetic number, because the mean of its divisors is an integer number (561852720000).

Almost surely, 2^{28251030580728} 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 28251030580728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35958574080000).

28251030580728 is an abundant number, since it is smaller than the sum of its proper divisors (43666117579272).

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

28251030580728 is a wasteful number, since it uses less digits than its factorization.

28251030580728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9249 (or 9245 counting only the distinct ones).

The product of its (nonzero) digits is 2150400, while the sum is 51.

The spelling of 28251030580728 in words is "twenty-eight trillion, two hundred fifty-one billion, thirty million, five hundred eighty thousand, seven hundred twenty-eight".