28500569 has 2 divisors, whose sum is σ = 28500570. Its totient is φ = 28500568.

The previous prime is 28500553. The next prime is 28500601. The reversal of 28500569 is 96500582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26574025 + 1926544 = 5155^2 + 1388^2 .

It is a cyclic number.

It is not a de Polignac number, because 28500569 - 2⁴ = 28500553 is a prime.

It is a super-2 number, since 2×28500569² = 1624564866647522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28500509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14250284 + 14250285.

It is an arithmetic number, because the mean of its divisors is an integer number (14250285).

Almost surely, 2^28500569 is an apocalyptic number.

It is an amenable number.

28500569 is a deficient number, since it is larger than the sum of its proper divisors (1).

28500569 is an equidigital number, since it uses as much as digits as its factorization.

28500569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 28500569 is about 5338.5924174823. The cubic root of 28500569 is about 305.4577700000.

The spelling of 28500569 in words is "twenty-eight million, five hundred thousand, five hundred sixty-nine".