28815790122 has 128 divisors (see below), whose sum is σ = 76115128320. Its totient is φ = 7909513920.

The previous prime is 28815790121. The next prime is 28815790139. The reversal of 28815790122 is 22109751882.

It is not an unprimeable number, because it can be changed into a prime (28815790121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 976963 + ... + 1006025.

It is an arithmetic number, because the mean of its divisors is an integer number (594649440).

Almost surely, 2^28815790122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28815790122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38057564160).

28815790122 is an abundant number, since it is smaller than the sum of its proper divisors (47299338198).

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

28815790122 is a wasteful number, since it uses less digits than its factorization.

28815790122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29185 (or 29179 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The spelling of 28815790122 in words is "twenty-eight billion, eight hundred fifteen million, seven hundred ninety thousand, one hundred twenty-two".