28250728104 has 64 divisors (see below), whose sum is σ = 72603590400. Its totient is φ = 9153817344.

The previous prime is 28250728097. The next prime is 28250728127. The reversal of 28250728104 is 40182705282.

It is a super-2 number, since 2×28250728104² (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 15 ways as a sum of consecutive naturals, for example, 970449 + ... + 999135.

It is an arithmetic number, because the mean of its divisors is an integer number (1134431100).

Almost surely, 2^28250728104 is an apocalyptic number.

28250728104 is a gapful number since it is divisible by the number (24) 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 28250728104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36301795200).

28250728104 is an abundant number, since it is smaller than the sum of its proper divisors (44352862296).

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

28250728104 is a wasteful number, since it uses less digits than its factorization.

28250728104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29842 (or 29838 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 39.

The spelling of 28250728104 in words is "twenty-eight billion, two hundred fifty million, seven hundred twenty-eight thousand, one hundred four".