28113730722 has 512 divisors, whose sum is σ = 88036761600. Its totient is φ = 6473364480.

The previous prime is 28113730717. The next prime is 28113730747. The reversal of 28113730722 is 22703731182.

28113730722 is a `hidden beast` number, since 281 + 1 + 373 + 0 + 7 + 2 + 2 = 666.

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 255 ways as a sum of consecutive naturals, for example, 162507028 + ... + 162507200.

It is an arithmetic number, because the mean of its divisors is an integer number (171946800).

Almost surely, 2^28113730722 is an apocalyptic number.

28113730722 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 28113730722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44018380800).

28113730722 is an abundant number, since it is smaller than the sum of its proper divisors (59923030878).

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

28113730722 is a wasteful number, since it uses less digits than its factorization.

28113730722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The spelling of 28113730722 in words is "twenty-eight billion, one hundred thirteen million, seven hundred thirty thousand, seven hundred twenty-two".