28036772028 has 360 divisors, whose sum is σ = 81690710640. Its totient is φ = 8375685120.

The previous prime is 28036772021. The next prime is 28036772087. The reversal of 28036772028 is 82027763082.

28036772028 is a `hidden beast` number, since 2 + 80 + 367 + 7 + 202 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28036772021) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 257218038 + ... + 257218146.

Almost surely, 2^28036772028 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 28036772028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40845355320).

28036772028 is an abundant number, since it is smaller than the sum of its proper divisors (53653938612).

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

28036772028 is a wasteful number, since it uses less digits than its factorization.

28036772028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The spelling of 28036772028 in words is "twenty-eight billion, thirty-six million, seven hundred seventy-two thousand, twenty-eight".