28057722317 has 2 divisors, whose sum is σ = 28057722318. Its totient is φ = 28057722316.

The previous prime is 28057722283. The next prime is 28057722359. The reversal of 28057722317 is 71322775082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18460385161 + 9597337156 = 135869^2 + 97966^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28057722317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28057022317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14028861158 + 14028861159.

It is an arithmetic number, because the mean of its divisors is an integer number (14028861159).

Almost surely, 2^28057722317 is an apocalyptic number.

It is an amenable number.

28057722317 is a deficient number, since it is larger than the sum of its proper divisors (1).

28057722317 is an equidigital number, since it uses as much as digits as its factorization.

28057722317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 329280, while the sum is 44.

The spelling of 28057722317 in words is "twenty-eight billion, fifty-seven million, seven hundred twenty-two thousand, three hundred seventeen".