28776828080 has 640 divisors, whose sum is σ = 94109976576. Its totient is φ = 7896268800.

The previous prime is 28776828079. The next prime is 28776828109. The reversal of 28776828080 is 8082867782.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 210049772 + ... + 210049908.

Almost surely, 2^28776828080 is an apocalyptic number.

28776828080 is a gapful number since it is divisible by the number (20) 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 28776828080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47054988288).

28776828080 is an abundant number, since it is smaller than the sum of its proper divisors (65333148496).

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

28776828080 is a wasteful number, since it uses less digits than its factorization.

28776828080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285 (or 279 counting only the distinct ones).

The product of its (nonzero) digits is 4816896, while the sum is 56.

The spelling of 28776828080 in words is "twenty-eight billion, seven hundred seventy-six million, eight hundred twenty-eight thousand, eighty".