28116250217 has 16 divisors (see below), whose sum is σ = 32295782400. Its totient is φ = 24208068240.

The previous prime is 28116250213. The next prime is 28116250223. The reversal of 28116250217 is 71205261182.

It is a cyclic number.

It is not a de Polignac number, because 28116250217 - 2² = 28116250213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28116250213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 801908 + ... + 836234.

It is an arithmetic number, because the mean of its divisors is an integer number (2018486400).

Almost surely, 2^28116250217 is an apocalyptic number.

It is an amenable number.

28116250217 is a deficient number, since it is larger than the sum of its proper divisors (4179532183).

28116250217 is a wasteful number, since it uses less digits than its factorization.

28116250217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38276.

The product of its (nonzero) digits is 13440, while the sum is 35.

The spelling of 28116250217 in words is "twenty-eight billion, one hundred sixteen million, two hundred fifty thousand, two hundred seventeen".