28680777792 has 168 divisors, whose sum is σ = 87733241856. Its totient is φ = 8926654464.

The previous prime is 28680777767. The next prime is 28680777869. The reversal of 28680777792 is 29777708682.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1232053 + ... + 1255115.

Almost surely, 2^28680777792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28680777792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43866620928).

28680777792 is an abundant number, since it is smaller than the sum of its proper divisors (59052464064).

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

28680777792 is a wasteful number, since it uses less digits than its factorization.

28680777792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23225 (or 23212 counting only the distinct ones).

The product of its (nonzero) digits is 33191424, while the sum is 63.

The spelling of 28680777792 in words is "twenty-eight billion, six hundred eighty million, seven hundred seventy-seven thousand, seven hundred ninety-two".