28564117 has 2 divisors, whose sum is σ = 28564118. Its totient is φ = 28564116.

The previous prime is 28564103. The next prime is 28564121. The reversal of 28564117 is 71146582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27102436 + 1461681 = 5206^2 + 1209^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28564117 is a prime.

It is equal to p_1774348 and since 28564117 and 1774348 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28564127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14282058 + 14282059.

It is an arithmetic number, because the mean of its divisors is an integer number (14282059).

Almost surely, 2^28564117 is an apocalyptic number.

It is an amenable number.

28564117 is a deficient number, since it is larger than the sum of its proper divisors (1).

28564117 is an equidigital number, since it uses as much as digits as its factorization.

28564117 is an odious number, because the sum of its binary digits is odd.

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

The square root of 28564117 is about 5344.5408596062. The cubic root of 28564117 is about 305.6846288751.

The spelling of 28564117 in words is "twenty-eight million, five hundred sixty-four thousand, one hundred seventeen".