28217005216 has 24 divisors (see below), whose sum is σ = 56462925204. Its totient is φ = 13877214720.

The previous prime is 28217005147. The next prime is 28217005237. The reversal of 28217005216 is 61250071282.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27047091600 + 1169913616 = 164460^2 + 34204^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7225765 + ... + 7229668.

Almost surely, 2^28217005216 is an apocalyptic number.

It is an amenable number.

28217005216 is an abundant number, since it is smaller than the sum of its proper divisors (28245919988).

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

28217005216 is a wasteful number, since it uses less digits than its factorization.

28217005216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14455504 (or 14455496 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

Adding to 28217005216 its reverse (61250071282), we get a palindrome (89467076498).

The spelling of 28217005216 in words is "twenty-eight billion, two hundred seventeen million, five thousand, two hundred sixteen".