28769896782 has 72 divisors (see below), whose sum is σ = 68752108152. Its totient is φ = 8688203040.

The previous prime is 28769896751. The next prime is 28769896819.

28769896782 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 28769896782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 615613 + ... + 660695.

It is an arithmetic number, because the mean of its divisors is an integer number (954890391).

Almost surely, 2^28769896782 is an apocalyptic number.

28769896782 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 28769896782, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34376054076).

28769896782 is an abundant number, since it is smaller than the sum of its proper divisors (39982211370).

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

28769896782 is a wasteful number, since it uses less digits than its factorization.

28769896782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45406 (or 45392 counting only the distinct ones).

The product of its digits is 292626432, while the sum is 72.

The spelling of 28769896782 in words is "twenty-eight billion, seven hundred sixty-nine million, eight hundred ninety-six thousand, seven hundred eighty-two".