28782227268 has 36 divisors (see below), whose sum is σ = 73572555420. Its totient is φ = 9486276096.

The previous prime is 28782227267. The next prime is 28782227291. The reversal of 28782227268 is 86272228782.

28782227268 is a `hidden beast` number, since 2 + 87 + 82 + 227 + 268 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18171579204 + 10610648064 = 134802^2 + 103008^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (28782227267) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4488405 + ... + 4494812.

It is an arithmetic number, because the mean of its divisors is an integer number (2043682095).

Almost surely, 2^28782227268 is an apocalyptic number.

It is an amenable number.

28782227268 is an abundant number, since it is smaller than the sum of its proper divisors (44790328152).

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

28782227268 is a wasteful number, since it uses less digits than its factorization.

28782227268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8983316 (or 8983311 counting only the distinct ones).

The product of its digits is 4816896, while the sum is 54.

The spelling of 28782227268 in words is "twenty-eight billion, seven hundred eighty-two million, two hundred twenty-seven thousand, two hundred sixty-eight".