28786910418 has 96 divisors (see below), whose sum is σ = 72339111936. Its totient is φ = 8103393504.

The previous prime is 28786910417. The next prime is 28786910437. The reversal of 28786910418 is 81401968782.

It is a super-2 number, since 2×28786910418² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28786910417) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 4001821 + ... + 4009007.

It is an arithmetic number, because the mean of its divisors is an integer number (753532416).

Almost surely, 2^28786910418 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28786910418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36169555968).

28786910418 is an abundant number, since it is smaller than the sum of its proper divisors (43552201518).

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

28786910418 is a wasteful number, since it uses less digits than its factorization.

28786910418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7668 (or 7665 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 54.

The spelling of 28786910418 in words is "twenty-eight billion, seven hundred eighty-six million, nine hundred ten thousand, four hundred eighteen".