28703569 has 2 divisors, whose sum is σ = 28703570. Its totient is φ = 28703568.

The previous prime is 28703513. The next prime is 28703573. The reversal of 28703569 is 96530782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20930625 + 7772944 = 4575^2 + 2788^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28703569 is a prime.

It is a super-2 number, since 2×28703569² = 1647789746675522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28703669) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14351784 + 14351785.

It is an arithmetic number, because the mean of its divisors is an integer number (14351785).

Almost surely, 2^28703569 is an apocalyptic number.

It is an amenable number.

28703569 is a deficient number, since it is larger than the sum of its proper divisors (1).

28703569 is an equidigital number, since it uses as much as digits as its factorization.

28703569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 28703569 is about 5357.5711847814. The cubic root of 28703569 is about 306.1812793745.

The spelling of 28703569 in words is "twenty-eight million, seven hundred three thousand, five hundred sixty-nine".