28770596217 has 12 divisors (see below), whose sum is σ = 45335485104. Its totient is φ = 17436724920.

The previous prime is 28770596213. The next prime is 28770596227. The reversal of 28770596217 is 71269507782.

It is a happy number.

28770596217 is a `hidden beast` number, since 2 + 8 + 7 + 7 + 0 + 5 + 9 + 621 + 7 = 666.

It is not a de Polignac number, because 28770596217 - 2² = 28770596213 is a prime.

It is a super-2 number, since 2×28770596217² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28770596213) 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, 145305943 + ... + 145306140.

It is an arithmetic number, because the mean of its divisors is an integer number (3777957092).

Almost surely, 2^28770596217 is an apocalyptic number.

It is an amenable number.

28770596217 is a deficient number, since it is larger than the sum of its proper divisors (16564888887).

28770596217 is a wasteful number, since it uses less digits than its factorization.

28770596217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290612100 (or 290612097 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 54.

The spelling of 28770596217 in words is "twenty-eight billion, seven hundred seventy million, five hundred ninety-six thousand, two hundred seventeen".